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FOODBORNE ILLNESS-UNKNOWN

Classification   |    Detailed evidence-based information

Therapeutic Toxic Class

    A) This management includes various types of food poisoning that may occur.
    B) For more specific information, please see the following FOODBORNE ILLNESS managements or shellfish poisoning managements:
    1) BOTULISM
    2) E COLI O157/O111
    3) FOODBORNE ILLNESS-BACILLUS CEREUS
    4) FOODBORNE ILLNESS-CAMPYLOBACTER
    5) FOODBORNE ILLNESS-CLOSTRIDIUM PERFRINGENS
    6) FOODBORNE ILLNESS-LISTERIA
    7) FOODBORNE ILLNESS-NOROVIRUS
    8) FOODBORNE ILLNESS-SALMONELLA
    9) FOODBORNE ILLNESS-SHIGELLA
    10) FOODBORNE ILLNESS-STAPHYLOCOCCUS
    11) FOODBORNE ILLNESS-STREPTOCOCCUS
    12) FOODBORNE ILLNESS-TOXOPLASMA GONDII
    13) BREVETOXIN
    14) CIGUATERA FISH POISONING
    15) DIARRHEIC SHELLFISH POISONING
    16) DOMOIC ACID
    17) PARALYTIC SHELLFISH
    18) SCOMBROID FISH POISONING
    19) TETRODOTOXIN

Specific Substances

    1) Unknown food poisoning
    2) Food poisoning unknown

Life Support

    A) This overview assumes that basic life support measures have been instituted.

Clinical Effects

    0.2.1) SUMMARY OF EXPOSURE
    A) TOXICOLOGY: Toxin pathophysiology varies depending upon the organism producing the toxin. However, in general, the majority of bacterial toxins will lead to cellular death and dysfunction in the GI tract leading to nausea, vomiting and diarrhea.
    B) EPIDEMIOLOGY: Foodborne illness is common. Approximately, 600 outbreaks of foodborne illnesses are reported in the United States every year. In the US, norovirus, salmonella, clostridium perfringens, campylobacter and staphylococcus aureus are the most common identified causes of foodborne illness. In the majority of cases or suspected foodborne illness, no specific pathogen is identified. Salmonella typhi and paratyphi are endemic in developing countries with poor sanitation. Shigella species cause a significant amount of traveler's diarrhea and frequently affects children below 5 years of age.
    C) WITH POISONING/EXPOSURE
    1) CLINICAL EFFECTS: Toxicity and clinical picture depends on the offending organism.
    2) MILD TO MODERATE TOXICITY: Most exposures lead to minor/moderate effects in the form of nausea, vomiting, diarrhea, and dehydration.
    3) SEVERE TOXICITY: Severe toxicity is uncommon though when it occurs is most commonly involves dehydration leading to organ failure, such as renal failure or hypotension. Patients may develop significant electrolyte abnormalities such as severe hyponatremia when symptoms are prolonged. Severe hyponatremia may lead to seizures. In general, infants, the elderly, immunocompromised patients, and those with underlying diseases are at greatest risk of severe complications. Some shellfish or reef fish ingestions may lead to severe neurologic toxicity in the form of paresthesias that may be permanent. Botulinum toxin and tetrodotoxin cause neuromuscular paralysis, and in severe cases death from respiratory failure.
    4) BACTERIAL FOODBORNE ILLNESS
    a) AEROMONAS HYDROPHILA: Clinical Effects: range from mild diarrhea, to dysentery with blood and mucous, or colitis. Complications: bacteremia, sepsis. Onset: more than 24 hours. Duration: a few days to a few weeks. Common sources: fish, shellfish, meats, produce.
    b) BACILLUS CEREUS: EMETIC SYNDROME: Nausea, vomiting, and general malaise. Common sources: starch-rich foods (eg, fried or cooked rice, pasta, pastries, or noodles). Onset: 0.5 to 6 hours. DIARRHEAL SYNDROME: Abdominal pain and watery diarrhea. Nausea may also occur. Meats and vegetables are common sources. Onset: 6 to 15 hours. Common sources: proteinaceous foods (ie, meat products, milk or milk products), soups, vegetables, puddings, and sauces. Duration: Symptoms typically resolve within 24 hours.
    c) CAMPYLOBACTER JEJUNI: Clinical effects: Bloody diarrhea, fever, abdominal pain, nausea, and vomiting; common cause of "traveler's diarrhea". Onset: 2 to 5 days. Duration: 2 to 14 days. Most common sources of exposure are undercooked chicken, raw milk and, less often, non-chlorinated water.
    d) CLOSTRIDIUM BOTULINUM: Clinical Effects: Dysphagia, ptosis, blurred vision, motor and respiratory paralysis. Onset: usually 18 to 36 hours. Common sources are home canned foods.
    e) CLOSTRIDIUM PERFRINGENS: Clinical effects: Abdominal pain, diarrhea that may be severe, and in some cases vomiting. Onset: 8 to 22 hours. Duration: 24 hours. Common Sources: poultry and heat processed meats.
    f) CRONOBACTER: Clinical effects: In infants, it causes poor feeding response, irritability, jaundice, grunting respirations, instability of body temperature, seizures. Complications: meningitis, sepsis, brain abscess, hydrocephalus, and developmental delay. Mortality 10% to 80%. Onset: a few days. Source: contaminated powdered infant formula.
    g) ENTEROCOCCUS: Clinical effects: Diarrhea, nausea, vomiting, fever, chills, dizziness. Complications: Endocarditis (mortality 15% to 20%) , bacteremia (mortality 50%), urinary tract infections, intra-abdominal and pelvic infections, nosocomial infections (particularly vancomycin resistant enterococcus). Onset: 2 to 36 hours. Duration: Common vehicles: sausage, evaporated milk, cheese, meat croquettes, meat pie, pudding, raw milk, and pasteurized milk. Note: The vast majority of enterococcus infections are not foodborne, but are the result of spread from the patients GI tract.
    h) ESCHERICHIA COLI: Several categories of illness are recognized, depending on the E. coli strains.
    1) ENTEROHEMORRHAGIC: Clinical Effects: Abdominal pain, diarrhea that becomes grossly bloody, occasional vomiting, fever (low grade). Complications: 3% to 7% of patients develop hemolytic uremic syndrome (HUS) or thrombotic, thrombocytopenic purpura (TTP). Onset: 3 to 4 days. Duration: 8 days. Source: Raw or undercooked hamburger, vegetables, milk, meats, fruits, seafood
    2) ENTEROTOXIGENIC: Clinical Effects: Usually mild self-limited illness, producing watery diarrhea, abdominal cramps, low-grade fever, nausea and fatigue. Onset: 26 hours. Duration: a few days. Source: Contamination of water with human sewage; infected food handlers, this is the chief cause of "traveler's diarrhea".
    3) ENTEROINVASIVE: Clinical effects: Diarrhea, abdominal cramps, vomiting, fever, chills, and fatigue. Onset: 12 to 72 hours. Duration: 5 to 7 days. Source: food contaminated with human feces from an ill person; outbreaks have been linked to ground beef and unpasteurized milk.
    4) ENTEROPATHOGENIC: Clinical effects: Profuse watery or bloody diarrhea, vomiting, low grade fever. Complications: Dehydration and electrolyte imbalance, especially in infants. Onset: Rapid, often within 4 hours. Duration: Can be protracted, 21 to 120 days. Source: Contaminated water, raw beef and poultry; or food exposed to fecal contamination.
    i) LISTERIA: Clinical effects: Initially mild symptoms of nausea, vomiting. In healthy individuals, it generally produces a mild, flu-like illness. Complications: Sepsis and meningitis may develop in the elderly or immunocompromised. Infection in pregnant women may spread to the fetus causing abortion, stillbirth, or bacteremia or meningitis in the neonate. Onset: GI symptoms usually develop in 2 to 3 days; severe invasive listerosis may take a few days to 3 months. Duration: A few days to several weeks, depending on underlying health. Source: Dairy products, raw milk, raw vegetables, ready to eat meats, raw and cooked poultry, soft cheeses
    j) PLESIOMONAS SHIGELLOIDES: Clinical effects: Fever, chills, abdominal pain, nausea, diarrhea, and/or vomiting. Onset: 20 to 50 hours. Duration 1 to 7 days. Vehicle: contaminated freshwater.
    k) SALMONELLA: Clinical effects: Fever and diarrhea, may include vomiting, abdominal pain and dysentery. Complications: Reactive arthritis (joint pain, uveitis, urethritis, conjunctivitis) develops in 2% of patients 3 to 4 weeks after acute symptoms. Onset: 6 to 72 hours. Duration: 1 to 2 days for acute symptoms, milder symptoms may last 4 to 7 days. Sources: Raw meats, poultry, eggs, milk and dairy products, peanut butter, and contact with certain pets (eg, turtles, lizards, chicks) are common sources.
    l) SHIGELLA: Clinical effects: Abdominal pain/cramps, diarrhea, fever, vomiting, blood, pus or mucus in stools. Complications: mucosal ulceration, rectal bleeding, and dehydration. Reactive arthritis and hemolytic uremic syndrome are possible. Onset: 8 to 50 hours. Duration: 5 to 7 days. Sources: Salads, raw vegetables, milk and dairy products, poultry, fecal contamination from a carrier.
    m) STAPHYLOCOCCUS: Clinical effects: Nausea, vomiting, diarrhea and abdominal pain. Onset: 1 to 7 hours (due to preformed toxin). Duration: a few hours to a day. Sources: Meats, pastries, and salads are commonly implicated foods.
    n) STREPTOCOCCUS: Clinical effects: Group A: Sore throat, fever, nausea, vomiting, headache, abdominal pain. Complications: Scarlet fever, rheumatic fever. Onset: 1 to 3 days. Duration: 4 days. Source: Infected food handler, milk, cream, eggs, cooked seafood, ground ham, various salads (potato, egg), ice cream, rice pudding.
    o) VIBRIO PARAHAEMOLYTICUS: Clinical Effects: Watery (occasionally bloody) diarrhea, abdominal cramps, nausea, vomiting, headache, fever and chills. Onset: 4 to 90 hours (mean 17 hours). Duration: 2 to 6 days. Sources: Raw or undercooked seafood.
    p) VIBRIO VULNIFICUS: Clinical Effects: can produce gastroenteritis (ie, vomiting, diarrhea, abdominal pain), wound infections, and primary septicemia. Wound infections can cause fever, hemorrhagic bullae, ulcers, tissue necrosis, and sepsis with hypotension and altered mental status. Onset: Gastroenteritis: 12 to 21 hours, onset of symptoms in cases of wound infection 4 hours; onset of sepsis 4 days. Duration: mean, 1.6 days. Sources: Most often raw Gulf coast oysters, also raw or undercooked seafood, clams or shrimp.
    q) YERSINIA ENTEROCOLITICA: Clinical Effects: Fever, abdominal pain, diarrhea in about 80% (may be bloody in about 10%), vomiting. Complications: Autoimmune complications occur in 2% to 3% and can include reactive arthritis, glomerulonephritis, endocarditis, erythema nodosum, uveitis, and thyroid disorders. Onset: 1 to 11 days. Duration: several days to 3 weeks. Sources: Meat, oysters, fish, crabs, raw milk.
    5) VIRAL FOODBORNE ILLNESS
    a) ASTROVIRUSES: Clinical Effects: Nausea, vomiting, diarrhea, malaise, abdominal pain, headache, and fever. Complications: Dehydration. Onset: 10 to 70 hours. Duration: 2 to 9 days. Vehicle: Fecal oral contamination; spread person to person or through contaminated food or water.
    b) HEPATITIS A: Clinical Effects: Fever, anorexia, nausea, vomiting, diarrhea, myalgia, hepatitis, jaundice. Complications: Fulminant hepatitis with massive hepatic necrosis occurs in 1% to 1.5% and is associated with a mortality rate of 70% to 80%. Onset: 15 to 50 days (mean 30 days). Duration: Typically 1 to 2 weeks. Vehicle: Fecal oral contamination, spread person to person or through contaminated food or water.
    c) NOROVIRUS: Clinical Effects: Vomiting, watery diarrhea, abdominal cramps and in some cases low grade fever. Onset: 12 to 48 hours. Duration: 12 to 60 hours (mean, 24 to 48 hours) in healthy adults and older children; may resolve within 72 to 96 hours in the elderly, very young children, or hospitalized patients; non-specific symptoms (eg, headache, thirst, vertigo) may last up to 19 days. Highly contagious, spread via oral fecal-route through contaminated food, water or fomites, or person-to-person contact. Also spread via aerosolization of vomitus. Most commonly occurs in situations where there is close person-to-person contact.
    d) ROTAVIRUS: Clinical Effects: Watery diarrhea, vomiting, fever. Complications: Dehydration, temporary lactose intolerance. Onset: Less than 48 hours. Duration: 3 to 7 days. Vehicle: Fecal oral contamination, spread person to person or through contaminated food or water.
    e) SAPOVIRUSES: Clinical Effects: Nausea, vomiting, diarrhea, malaise, abdominal pain, headache, and fever. Complications: Dehydration. Onset: 10 to 70 hours. Duration: 2 to 9 days. Vehicle: Fecal oral contamination, spread person to person or through contaminated food or water.
    6) PARASITES:
    a) ANISAKIASIS SIMPLEX: Typically asymptomatic. If the worm burrows into intestinal wall, it can cause a local inflammatory response, severe abdominal pain, nausea, vomiting, and diarrhea. Onset: 1 day to 2 weeks. Duration: Worm typically expelled in 3 weeks, but symptoms may persists for weeks or months from inflamed lesions where worm attached. Sources: raw marine fish, mostly herring, salmon.
    b) CRYPTOSPORIDIUM: Clinical Effects: Self-limiting disease in healthy people, may be asymptomatic or may have mild to severe diarrhea, nausea, vomiting and abdominal cramping. Complications: In immunocompromised patients, particularly AIDS, may cause severe diarrhea and dehydration that can be fatal. Extraintestinal infection can develop in the biliary tree, lungs or middle ear. Onset: 7 to 10 days. Duration: 2 to 14 days in healthy people. May cause lifelong infection in patients with AIDS. Sources: Fecally contaminated water, including recreational water, infected food handlers.
    c) CYCLOSPORA CAYETANENSIS: Clinical Effects: Watery diarrhea (may be explosive), anorexia, weight loss, abdominal cramping and bloating, nausea, and fatigue. Flu like symptoms such as headache, vomiting, fever and myalgias can also occur. Complications: Dehydration. Onset: 7 to 10 days. Duration: untreated may persist days to months. Sources: Fecal oral contamination, fresh produce.
    d) DIPHYLLOBOTHRIASIS: Clinical Effects: Mild symptoms include mild chronic abdominal cramps, loose stools, and fatigue. Complications: Vitamin B12 deficiency with resulting anemia or intestinal obstruction are rare complications in patients with longstanding or massive infections. Onset: tapeworm may produce eggs 15 days after ingestion.
    e) KUDOA SEPTEMPUNCTATA: Clinical Effects: Vomiting, diarrhea (may be watery), and abdominal pain. Onset: 1 to 9 hours after ingestion. Source: Aquacultured olive flounder.
    f) GIARDIA: Clinical Effects: explosive, foul smelling diarrhea, cramps, fever, and weight loss. Complications: Malabsorption, weight loss, dehydration. Disaccharide intolerance, primarily to lactose, develops in about 40% and may persist for 6 months. Onset: 1 to 2 weeks. Duration: 2 to 6 weeks, chronic cases can occur. Sources: Common source is unclean water.
    g) TRICHINOSIS (Trichinella Spiralis): Clinical Effects: Diarrhea, fever, myalgias, edema especially of the face. Complications: Myocarditis, encephalitis, and thromboembolic disease. Onset: 1 to 2 days for the gastrointestinal phase (larvae penetrate GI mucosa and mature into adult worms), 2 to 8 weeks for the parenteral phase (adult worms mate, produce larvae that spread via the bloodstream to skeletal muscle). Source: meat, especially undercooked pork.
    7) FISH POISONING may include the following:
    a) AMNESIC (DOMOIC ACID) SHELLFISH POISONING: Primary symptoms of mollusk poisonings are gastrointestinal and neurologic, but cardiovascular symptoms have also been observed. Initial symptoms include nausea, vomiting, and diarrhea that may progress to hypotension, pulmonary edema, seizures, coma, and death. Onset: Approximately 5 hours (range: 0.25 to 38 hours) after ingestion. Younger patients have more gastrointestinal symptoms.
    b) CIGUATERA: Ciguatera poisoning is characterized by a triad of diarrhea, vomiting, and myalgias, usually beginning 6 to 24 hours following ingestion of contaminated fish. Paraesthesia and temperature reversal sensation are common and may persist for weeks or months. In the West Indies, gastrointestinal symptoms appear first (within 1 to 6 hours) and usually resolve within 3 days followed by neurologic symptoms. The neurological problems are often seen first in the South Pacific. Fatalities are rare.
    c) DIARRHEIC SHELLFISH POISONING: Clinical findings include chills, abdominal pain, nausea, vomiting and diarrhea. Vehicle: shellfish.
    d) NEUROTOXIC (BREVETOXIN) SHELLFISH POISONING: Clinical findings include paresthesia of the face, throat, fingers, toes, and a burning sensation of the mucous membranes. Abdominal pain and/or cramps, incoordination, seizures, possible coma, bronchospasm and respiratory distress may also be observed. Onset: 1 to 18 hours. Vehicle: Clams, oysters, bivalve mollusks. These toxins are heat stable, and can be poisonous when ingested as a cooked meal.
    e) PARALYTIC SHELLFISH POISONING: Initially patients feel numbness of fingertips and mouth, followed by muscular incoordination, respiratory distress, paralysis, and death (if respiratory support is not provided). Onset is rapid, generally within 30 to 60 minutes. Vehicle: Mussels, clams, and oysters.
    f) SCOMBROID FISH POISONING: Individuals may complain of a "sharp" or "peppery" taste after eating spoiled fish that is due to a histamine reaction. Onset: 30 to 60 minutes after ingestion. A common presentation is a diffuse erythematous flushing of the skin with either pruritus or a burning sensation, throbbing headache, palpitations, and gastrointestinal symptoms of cramping, diarrhea, nausea or vomiting. Symptoms usually resolve within 3 to 36 hours (mean 14 hours).
    g) TETRODOTOXIN (Puffer Fish): Clinical findings include hypothermia, hypotension, respiratory muscle paralysis, vomiting, pallor, excessive sweating, and paresthesias. Onset: Usually 10 to 45 minutes, but may be delayed up to 3 hours. Duration: Death from respiratory failure may occur in the first 6 to 24 hours. Prognosis is good if the patient survives the first 24 hours.
    8) WHELK POISONING: (Snail) Patients may experience blurred vision, weakness, paralysis or muscle twitching. Symptoms are curare-like and usually resolve within 24 hours.
    9) SPONGIFORM ENCEPHALOPATHY: Clinical Effects: Initial manifestations are psychiatric, primarily depression, followed by paresthesias, and problems with coordination and walking. Forgetfulness is then followed by progressively more severe problems processing information and speaking. Patients eventually become unable to care for themselves. Complications: Uniformly fatal; median time from initial diagnosis to death is 14 months (up to 2 years). Onset: About 10 years between exposure and initial clinical signs. Median age of onset for variant Creutzfeldt-Jakob Disease is 28 years (range 16 to 52 years). Source: Meat or meat by-products from bovine spongiform encephalopathy infected animals, primarily cattle.
    0.2.3) VITAL SIGNS
    A) WITH POISONING/EXPOSURE
    1) Fever has been associated with several types of foodborne illnesses, including Campylobacter jejuni, diarrheic shellfish poisoning, E. Coli, Giardia, Hepatitis A, Listeria, Norwalk Virus, Salmonella spp., Shigella spp., Streptococcus spp., Trichinosis, Vibrio spp., and Yersinia enterocolitica.

Laboratory Monitoring

    A) In the vast majority of patients with food poisoning, no laboratory evaluation is necessary and most cases can be managed symptomatically.
    B) Obtain serum electrolytes and CBC, if patients have a severe or prolonged course, have significant comorbid disease, or have symptoms suggestive of an alternative diagnosis.
    C) Stool analysis may offer clues to the etiology of the organism, however, treatment should not be delayed to confirm the diagnosis.

Treatment Overview

    0.4.2) ORAL/PARENTERAL EXPOSURE
    A) MANAGEMENT OF MILD TO MODERATE TOXICITY
    1) Supportive care is the mainstay of care for patients with food poisoning. If the patient is unable to take oral fluids, IV rehydration with isotonic fluids should be initiated. Antiemetics should be given liberally. TRAVELER'S DIARRHEA: Cases of traveler's diarrhea should be treated with antibiotics depending on the organism suspected. Ciprofloxacin: ADULT: 500 mg orally twice daily for 3 days; CHILD: 10 to 20 mg/kg orally twice daily for 3 days OR Trimethoprim/Sulfamethoxazole: ADULT: 160/800 mg orally twice daily for 5 days; CHILD: 4 to 5 mg/kg orally twice daily for 3 days.
    B) MANAGEMENT OF SEVERE TOXICITY
    1) Patients with associated organ failure due to dehydration need aggressive rehydration. If dehydration is associated with significant hyponatremia, care should be made to determine the time course of fluid losses and the sodium should be repleted slowly after initial volume expansion. Seizures should be treated with benzodiazepines as first line therapy (lorazepam 0.05 mg/kg or diazepam 0.1 mg/kg). If seizures are felt to be due to hyponatremia the patient should be given hypertonic saline (3% saline 1 to 2 mL/kg bolus). Patients suspected of having botulism should be given botulinum immunoglobulin antitoxin (BIG) obtained from the US CDC. Administration of BIG should not be delayed for definitive diagnosis as these results can take weeks. Closely monitor airway and breathing in neurologically affected patients. Intubation and respiratory support may be necessary in patients with botulism or paralytic shellfish poisoning.
    C) DECONTAMINATION
    1) PREHOSPITAL: Decontamination is not indicated in the prehospital setting.
    2) HOSPITAL: Activated charcoal is recommended for treatment of botulinum exposure since it may bind type A botulinum toxin in the gut. Activated charcoal is not recommended in most other types of food poisoning due to the presence of nausea and vomiting.
    D) AIRWAY MANAGEMENT
    1) Airway protection and management should be considered in any patient with paralytic symptoms.
    E) ANTIDOTE
    1) There is no specific antidote for food poisoning. However, an antitoxin for clostridium botulism is available by contacting the CDC. The antitoxin can help to prevent the progression of muscle weakness, but does not reverse existing paralysis.
    F) PATIENT DISPOSITION
    1) HOME CRITERIA: Many patients do well with oral rehydration and can be managed at home.
    2) OBSERVATION CRITERIA: Patients with intractable vomiting, severe pain, or significant underlying illness may require referral for medical treatment. A patient can be discharged when they are tolerating oral fluids without vomiting and vital signs are within normal limits.
    3) ADMISSION CRITERIA: Patients with muscle paralysis or weakness suggestive of Clostridium botulism or other paralytic toxin ingestion should be admitted. Those that have persistent vomiting and diarrhea despite supportive care should be admitted.
    4) CONSULT CRITERIA: A toxicologist should be consulted in cases of suspected botulism. Infectious disease should be consulted for aid in determining the responsible organism in cases of traveler's diarrhea of when symptoms do not respond to initial therapy.
    G) DIFFERENTIAL DIAGNOSIS
    1) Alternative medical and surgical diagnosis leading to nausea, vomiting, and diarrhea should be considered. Such diagnoses include bowel obstruction, infectious hepatitis, volvulus, appendicitis, porphyria, as well as many other disorders.

Range Of Toxicity

    A) The severity of the toxicity depends on the virulence of the organism, number of organisms ingested, and the host patient co-morbidities and immunity.

Summary Of Exposure

    A) TOXICOLOGY: Toxin pathophysiology varies depending upon the organism producing the toxin. However, in general, the majority of bacterial toxins will lead to cellular death and dysfunction in the GI tract leading to nausea, vomiting and diarrhea.
    B) EPIDEMIOLOGY: Foodborne illness is common. Approximately, 600 outbreaks of foodborne illnesses are reported in the United States every year. In the US, norovirus, salmonella, clostridium perfringens, campylobacter and staphylococcus aureus are the most common identified causes of foodborne illness. In the majority of cases or suspected foodborne illness, no specific pathogen is identified. Salmonella typhi and paratyphi are endemic in developing countries with poor sanitation. Shigella species cause a significant amount of traveler's diarrhea and frequently affects children below 5 years of age.
    C) WITH POISONING/EXPOSURE
    1) CLINICAL EFFECTS: Toxicity and clinical picture depends on the offending organism.
    2) MILD TO MODERATE TOXICITY: Most exposures lead to minor/moderate effects in the form of nausea, vomiting, diarrhea, and dehydration.
    3) SEVERE TOXICITY: Severe toxicity is uncommon though when it occurs is most commonly involves dehydration leading to organ failure, such as renal failure or hypotension. Patients may develop significant electrolyte abnormalities such as severe hyponatremia when symptoms are prolonged. Severe hyponatremia may lead to seizures. In general, infants, the elderly, immunocompromised patients, and those with underlying diseases are at greatest risk of severe complications. Some shellfish or reef fish ingestions may lead to severe neurologic toxicity in the form of paresthesias that may be permanent. Botulinum toxin and tetrodotoxin cause neuromuscular paralysis, and in severe cases death from respiratory failure.
    4) BACTERIAL FOODBORNE ILLNESS
    a) AEROMONAS HYDROPHILA: Clinical Effects: range from mild diarrhea, to dysentery with blood and mucous, or colitis. Complications: bacteremia, sepsis. Onset: more than 24 hours. Duration: a few days to a few weeks. Common sources: fish, shellfish, meats, produce.
    b) BACILLUS CEREUS: EMETIC SYNDROME: Nausea, vomiting, and general malaise. Common sources: starch-rich foods (eg, fried or cooked rice, pasta, pastries, or noodles). Onset: 0.5 to 6 hours. DIARRHEAL SYNDROME: Abdominal pain and watery diarrhea. Nausea may also occur. Meats and vegetables are common sources. Onset: 6 to 15 hours. Common sources: proteinaceous foods (ie, meat products, milk or milk products), soups, vegetables, puddings, and sauces. Duration: Symptoms typically resolve within 24 hours.
    c) CAMPYLOBACTER JEJUNI: Clinical effects: Bloody diarrhea, fever, abdominal pain, nausea, and vomiting; common cause of "traveler's diarrhea". Onset: 2 to 5 days. Duration: 2 to 14 days. Most common sources of exposure are undercooked chicken, raw milk and, less often, non-chlorinated water.
    d) CLOSTRIDIUM BOTULINUM: Clinical Effects: Dysphagia, ptosis, blurred vision, motor and respiratory paralysis. Onset: usually 18 to 36 hours. Common sources are home canned foods.
    e) CLOSTRIDIUM PERFRINGENS: Clinical effects: Abdominal pain, diarrhea that may be severe, and in some cases vomiting. Onset: 8 to 22 hours. Duration: 24 hours. Common Sources: poultry and heat processed meats.
    f) CRONOBACTER: Clinical effects: In infants, it causes poor feeding response, irritability, jaundice, grunting respirations, instability of body temperature, seizures. Complications: meningitis, sepsis, brain abscess, hydrocephalus, and developmental delay. Mortality 10% to 80%. Onset: a few days. Source: contaminated powdered infant formula.
    g) ENTEROCOCCUS: Clinical effects: Diarrhea, nausea, vomiting, fever, chills, dizziness. Complications: Endocarditis (mortality 15% to 20%) , bacteremia (mortality 50%), urinary tract infections, intra-abdominal and pelvic infections, nosocomial infections (particularly vancomycin resistant enterococcus). Onset: 2 to 36 hours. Duration: Common vehicles: sausage, evaporated milk, cheese, meat croquettes, meat pie, pudding, raw milk, and pasteurized milk. Note: The vast majority of enterococcus infections are not foodborne, but are the result of spread from the patients GI tract.
    h) ESCHERICHIA COLI: Several categories of illness are recognized, depending on the E. coli strains.
    1) ENTEROHEMORRHAGIC: Clinical Effects: Abdominal pain, diarrhea that becomes grossly bloody, occasional vomiting, fever (low grade). Complications: 3% to 7% of patients develop hemolytic uremic syndrome (HUS) or thrombotic, thrombocytopenic purpura (TTP). Onset: 3 to 4 days. Duration: 8 days. Source: Raw or undercooked hamburger, vegetables, milk, meats, fruits, seafood
    2) ENTEROTOXIGENIC: Clinical Effects: Usually mild self-limited illness, producing watery diarrhea, abdominal cramps, low-grade fever, nausea and fatigue. Onset: 26 hours. Duration: a few days. Source: Contamination of water with human sewage; infected food handlers, this is the chief cause of "traveler's diarrhea".
    3) ENTEROINVASIVE: Clinical effects: Diarrhea, abdominal cramps, vomiting, fever, chills, and fatigue. Onset: 12 to 72 hours. Duration: 5 to 7 days. Source: food contaminated with human feces from an ill person; outbreaks have been linked to ground beef and unpasteurized milk.
    4) ENTEROPATHOGENIC: Clinical effects: Profuse watery or bloody diarrhea, vomiting, low grade fever. Complications: Dehydration and electrolyte imbalance, especially in infants. Onset: Rapid, often within 4 hours. Duration: Can be protracted, 21 to 120 days. Source: Contaminated water, raw beef and poultry; or food exposed to fecal contamination.
    i) LISTERIA: Clinical effects: Initially mild symptoms of nausea, vomiting. In healthy individuals, it generally produces a mild, flu-like illness. Complications: Sepsis and meningitis may develop in the elderly or immunocompromised. Infection in pregnant women may spread to the fetus causing abortion, stillbirth, or bacteremia or meningitis in the neonate. Onset: GI symptoms usually develop in 2 to 3 days; severe invasive listerosis may take a few days to 3 months. Duration: A few days to several weeks, depending on underlying health. Source: Dairy products, raw milk, raw vegetables, ready to eat meats, raw and cooked poultry, soft cheeses
    j) PLESIOMONAS SHIGELLOIDES: Clinical effects: Fever, chills, abdominal pain, nausea, diarrhea, and/or vomiting. Onset: 20 to 50 hours. Duration 1 to 7 days. Vehicle: contaminated freshwater.
    k) SALMONELLA: Clinical effects: Fever and diarrhea, may include vomiting, abdominal pain and dysentery. Complications: Reactive arthritis (joint pain, uveitis, urethritis, conjunctivitis) develops in 2% of patients 3 to 4 weeks after acute symptoms. Onset: 6 to 72 hours. Duration: 1 to 2 days for acute symptoms, milder symptoms may last 4 to 7 days. Sources: Raw meats, poultry, eggs, milk and dairy products, peanut butter, and contact with certain pets (eg, turtles, lizards, chicks) are common sources.
    l) SHIGELLA: Clinical effects: Abdominal pain/cramps, diarrhea, fever, vomiting, blood, pus or mucus in stools. Complications: mucosal ulceration, rectal bleeding, and dehydration. Reactive arthritis and hemolytic uremic syndrome are possible. Onset: 8 to 50 hours. Duration: 5 to 7 days. Sources: Salads, raw vegetables, milk and dairy products, poultry, fecal contamination from a carrier.
    m) STAPHYLOCOCCUS: Clinical effects: Nausea, vomiting, diarrhea and abdominal pain. Onset: 1 to 7 hours (due to preformed toxin). Duration: a few hours to a day. Sources: Meats, pastries, and salads are commonly implicated foods.
    n) STREPTOCOCCUS: Clinical effects: Group A: Sore throat, fever, nausea, vomiting, headache, abdominal pain. Complications: Scarlet fever, rheumatic fever. Onset: 1 to 3 days. Duration: 4 days. Source: Infected food handler, milk, cream, eggs, cooked seafood, ground ham, various salads (potato, egg), ice cream, rice pudding.
    o) VIBRIO PARAHAEMOLYTICUS: Clinical Effects: Watery (occasionally bloody) diarrhea, abdominal cramps, nausea, vomiting, headache, fever and chills. Onset: 4 to 90 hours (mean 17 hours). Duration: 2 to 6 days. Sources: Raw or undercooked seafood.
    p) VIBRIO VULNIFICUS: Clinical Effects: can produce gastroenteritis (ie, vomiting, diarrhea, abdominal pain), wound infections, and primary septicemia. Wound infections can cause fever, hemorrhagic bullae, ulcers, tissue necrosis, and sepsis with hypotension and altered mental status. Onset: Gastroenteritis: 12 to 21 hours, onset of symptoms in cases of wound infection 4 hours; onset of sepsis 4 days. Duration: mean, 1.6 days. Sources: Most often raw Gulf coast oysters, also raw or undercooked seafood, clams or shrimp.
    q) YERSINIA ENTEROCOLITICA: Clinical Effects: Fever, abdominal pain, diarrhea in about 80% (may be bloody in about 10%), vomiting. Complications: Autoimmune complications occur in 2% to 3% and can include reactive arthritis, glomerulonephritis, endocarditis, erythema nodosum, uveitis, and thyroid disorders. Onset: 1 to 11 days. Duration: several days to 3 weeks. Sources: Meat, oysters, fish, crabs, raw milk.
    5) VIRAL FOODBORNE ILLNESS
    a) ASTROVIRUSES: Clinical Effects: Nausea, vomiting, diarrhea, malaise, abdominal pain, headache, and fever. Complications: Dehydration. Onset: 10 to 70 hours. Duration: 2 to 9 days. Vehicle: Fecal oral contamination; spread person to person or through contaminated food or water.
    b) HEPATITIS A: Clinical Effects: Fever, anorexia, nausea, vomiting, diarrhea, myalgia, hepatitis, jaundice. Complications: Fulminant hepatitis with massive hepatic necrosis occurs in 1% to 1.5% and is associated with a mortality rate of 70% to 80%. Onset: 15 to 50 days (mean 30 days). Duration: Typically 1 to 2 weeks. Vehicle: Fecal oral contamination, spread person to person or through contaminated food or water.
    c) NOROVIRUS: Clinical Effects: Vomiting, watery diarrhea, abdominal cramps and in some cases low grade fever. Onset: 12 to 48 hours. Duration: 12 to 60 hours (mean, 24 to 48 hours) in healthy adults and older children; may resolve within 72 to 96 hours in the elderly, very young children, or hospitalized patients; non-specific symptoms (eg, headache, thirst, vertigo) may last up to 19 days. Highly contagious, spread via oral fecal-route through contaminated food, water or fomites, or person-to-person contact. Also spread via aerosolization of vomitus. Most commonly occurs in situations where there is close person-to-person contact.
    d) ROTAVIRUS: Clinical Effects: Watery diarrhea, vomiting, fever. Complications: Dehydration, temporary lactose intolerance. Onset: Less than 48 hours. Duration: 3 to 7 days. Vehicle: Fecal oral contamination, spread person to person or through contaminated food or water.
    e) SAPOVIRUSES: Clinical Effects: Nausea, vomiting, diarrhea, malaise, abdominal pain, headache, and fever. Complications: Dehydration. Onset: 10 to 70 hours. Duration: 2 to 9 days. Vehicle: Fecal oral contamination, spread person to person or through contaminated food or water.
    6) PARASITES:
    a) ANISAKIASIS SIMPLEX: Typically asymptomatic. If the worm burrows into intestinal wall, it can cause a local inflammatory response, severe abdominal pain, nausea, vomiting, and diarrhea. Onset: 1 day to 2 weeks. Duration: Worm typically expelled in 3 weeks, but symptoms may persists for weeks or months from inflamed lesions where worm attached. Sources: raw marine fish, mostly herring, salmon.
    b) CRYPTOSPORIDIUM: Clinical Effects: Self-limiting disease in healthy people, may be asymptomatic or may have mild to severe diarrhea, nausea, vomiting and abdominal cramping. Complications: In immunocompromised patients, particularly AIDS, may cause severe diarrhea and dehydration that can be fatal. Extraintestinal infection can develop in the biliary tree, lungs or middle ear. Onset: 7 to 10 days. Duration: 2 to 14 days in healthy people. May cause lifelong infection in patients with AIDS. Sources: Fecally contaminated water, including recreational water, infected food handlers.
    c) CYCLOSPORA CAYETANENSIS: Clinical Effects: Watery diarrhea (may be explosive), anorexia, weight loss, abdominal cramping and bloating, nausea, and fatigue. Flu like symptoms such as headache, vomiting, fever and myalgias can also occur. Complications: Dehydration. Onset: 7 to 10 days. Duration: untreated may persist days to months. Sources: Fecal oral contamination, fresh produce.
    d) DIPHYLLOBOTHRIASIS: Clinical Effects: Mild symptoms include mild chronic abdominal cramps, loose stools, and fatigue. Complications: Vitamin B12 deficiency with resulting anemia or intestinal obstruction are rare complications in patients with longstanding or massive infections. Onset: tapeworm may produce eggs 15 days after ingestion.
    e) KUDOA SEPTEMPUNCTATA: Clinical Effects: Vomiting, diarrhea (may be watery), and abdominal pain. Onset: 1 to 9 hours after ingestion. Source: Aquacultured olive flounder.
    f) GIARDIA: Clinical Effects: explosive, foul smelling diarrhea, cramps, fever, and weight loss. Complications: Malabsorption, weight loss, dehydration. Disaccharide intolerance, primarily to lactose, develops in about 40% and may persist for 6 months. Onset: 1 to 2 weeks. Duration: 2 to 6 weeks, chronic cases can occur. Sources: Common source is unclean water.
    g) TRICHINOSIS (Trichinella Spiralis): Clinical Effects: Diarrhea, fever, myalgias, edema especially of the face. Complications: Myocarditis, encephalitis, and thromboembolic disease. Onset: 1 to 2 days for the gastrointestinal phase (larvae penetrate GI mucosa and mature into adult worms), 2 to 8 weeks for the parenteral phase (adult worms mate, produce larvae that spread via the bloodstream to skeletal muscle). Source: meat, especially undercooked pork.
    7) FISH POISONING may include the following:
    a) AMNESIC (DOMOIC ACID) SHELLFISH POISONING: Primary symptoms of mollusk poisonings are gastrointestinal and neurologic, but cardiovascular symptoms have also been observed. Initial symptoms include nausea, vomiting, and diarrhea that may progress to hypotension, pulmonary edema, seizures, coma, and death. Onset: Approximately 5 hours (range: 0.25 to 38 hours) after ingestion. Younger patients have more gastrointestinal symptoms.
    b) CIGUATERA: Ciguatera poisoning is characterized by a triad of diarrhea, vomiting, and myalgias, usually beginning 6 to 24 hours following ingestion of contaminated fish. Paraesthesia and temperature reversal sensation are common and may persist for weeks or months. In the West Indies, gastrointestinal symptoms appear first (within 1 to 6 hours) and usually resolve within 3 days followed by neurologic symptoms. The neurological problems are often seen first in the South Pacific. Fatalities are rare.
    c) DIARRHEIC SHELLFISH POISONING: Clinical findings include chills, abdominal pain, nausea, vomiting and diarrhea. Vehicle: shellfish.
    d) NEUROTOXIC (BREVETOXIN) SHELLFISH POISONING: Clinical findings include paresthesia of the face, throat, fingers, toes, and a burning sensation of the mucous membranes. Abdominal pain and/or cramps, incoordination, seizures, possible coma, bronchospasm and respiratory distress may also be observed. Onset: 1 to 18 hours. Vehicle: Clams, oysters, bivalve mollusks. These toxins are heat stable, and can be poisonous when ingested as a cooked meal.
    e) PARALYTIC SHELLFISH POISONING: Initially patients feel numbness of fingertips and mouth, followed by muscular incoordination, respiratory distress, paralysis, and death (if respiratory support is not provided). Onset is rapid, generally within 30 to 60 minutes. Vehicle: Mussels, clams, and oysters.
    f) SCOMBROID FISH POISONING: Individuals may complain of a "sharp" or "peppery" taste after eating spoiled fish that is due to a histamine reaction. Onset: 30 to 60 minutes after ingestion. A common presentation is a diffuse erythematous flushing of the skin with either pruritus or a burning sensation, throbbing headache, palpitations, and gastrointestinal symptoms of cramping, diarrhea, nausea or vomiting. Symptoms usually resolve within 3 to 36 hours (mean 14 hours).
    g) TETRODOTOXIN (Puffer Fish): Clinical findings include hypothermia, hypotension, respiratory muscle paralysis, vomiting, pallor, excessive sweating, and paresthesias. Onset: Usually 10 to 45 minutes, but may be delayed up to 3 hours. Duration: Death from respiratory failure may occur in the first 6 to 24 hours. Prognosis is good if the patient survives the first 24 hours.
    8) WHELK POISONING: (Snail) Patients may experience blurred vision, weakness, paralysis or muscle twitching. Symptoms are curare-like and usually resolve within 24 hours.
    9) SPONGIFORM ENCEPHALOPATHY: Clinical Effects: Initial manifestations are psychiatric, primarily depression, followed by paresthesias, and problems with coordination and walking. Forgetfulness is then followed by progressively more severe problems processing information and speaking. Patients eventually become unable to care for themselves. Complications: Uniformly fatal; median time from initial diagnosis to death is 14 months (up to 2 years). Onset: About 10 years between exposure and initial clinical signs. Median age of onset for variant Creutzfeldt-Jakob Disease is 28 years (range 16 to 52 years). Source: Meat or meat by-products from bovine spongiform encephalopathy infected animals, primarily cattle.

Vital Signs

    3.3.1) SUMMARY
    A) WITH POISONING/EXPOSURE
    1) Fever has been associated with several types of foodborne illnesses, including Campylobacter jejuni, diarrheic shellfish poisoning, E. Coli, Giardia, Hepatitis A, Listeria, Norwalk Virus, Salmonella spp., Shigella spp., Streptococcus spp., Trichinosis, Vibrio spp., and Yersinia enterocolitica.
    3.3.3) TEMPERATURE
    A) WITH POISONING/EXPOSURE
    1) FEVER
    a) The following food poisonings are likely to be associated with fever:
    1) Campylobacter jejuni
    2) Diarrheic shellfish poisoning (chills and fever may occur)
    3) E. Coli (Enteroinvasive)
    4) E. Coli (Enteropathogenic)
    5) E. Coli (Enterotoxigenic) (low-grade fever)
    6) E. Coli (Enterohemorrhagic/0157:H7) (may be low grade or absent)
    7) Giardia
    8) Hepatitis A
    9) Listeria monocytogenes (symptoms may be persistent)
    10) Norwalk Virus (low-grade fever)
    11) Salmonella spp.
    12) Shigella spp.
    13) Streptococcus spp.
    14) Trichinosis
    15) Vibrio parahaemolyticus or V. vulnificus
    16) Yersinia enterocolitica (fever and abdominal pain are hallmark symptoms)
    b) The following food poisonings are unlikely be associated with fever :
    1) Anisakis simplex
    2) Ciguatera fish poisoning (chills may develop without fever)
    3) Clostridium botulinum
    4) E. Coli (Enterohemorrhagic/0157:H7) (may be low grade or absent)
    2) HYPOTHERMIA
    a) TETRODOTOXIN: Hypothermia may develop (Kao, 1966; Oda et al, 1989; Tambyah et al, 1994).

Heent

    3.4.6) THROAT
    A) WITH POISONING/EXPOSURE
    1) CLOSTRIDIUM BOTULINUM: Early indicators of botulism include dysphagia and dry mouth followed within 24 hours by blurred or double vision (Roblot et al, 1994; Simcock et al, 1994) (APHA, 1995).
    2) STREPTOCOCCAL/GROUP A: Causes the typical symptoms (ie, pharyngitis, high fever, headache, pain with swallowing) associated with strep throat and scarlet fever (Center for Food Safety and Applied Nutrition (CFSAN), 2012).

Cardiovascular

    3.5.2) CLINICAL EFFECTS
    A) TACHYCARDIA
    1) WITH POISONING/EXPOSURE
    a) Tachycardia is common in patients with dehydration and/or fever secondary to foodborne illness. Hypotension may develop in patients with severe dehydration.
    B) HYPOTENSIVE EPISODE
    1) WITH POISONING/EXPOSURE
    a) CIGUATERA FISH POISONING: Hypotension with a relative bradycardia (pulse less than 60) has been reported infrequently in some adult exposures. Some patients become symptomatic and require intervention. Cardiovascular effects generally resolve within 2 to 5 days, but orthostatic hypotension may persist for weeks after exposure (Bagnis & Legrand, 1987; Geller et al, 1991; Geller & Benowitz, 1992).
    b) TETRODOTOXIN: Hypotension due to vasodilation commonly occurs. Patients with severe tetrodotoxin intoxication may develop cyanosis and hypotension (How et al, 2003; Yang et al, 1996; CDC, 1996; Noguchi & Ebesu, 2001).
    C) PALPITATIONS
    1) WITH POISONING/EXPOSURE
    a) SCOMBROID FISH POISONING: Palpitations are frequently described (Predy et al, 2004; Merson et al, 1974; Gilbert et al, 1980; Sabroe & Kobza Black, 1998).

Respiratory

    3.6.2) CLINICAL EFFECTS
    A) ACUTE RESPIRATORY INSUFFICIENCY
    1) CLOSTRIDIUM BOTULINUM: Paralysis of the respiratory muscles can occur in botulism. Respiratory difficulty or failure can result (Beushausen T, Greve M & Ziesing S, 1994; Staiger R & Zilker T, 1994), and in one study, occurred within 12 hours of the initial eye effects (ptosis, blurred or double vision) associated with cranial nerve involvement (Simcock et al, 1994).
    2) PARALYTIC SHELLFISH POISONING: Respiratory failure may be seen due to paralysis of the respiratory muscle (Acres & Gray, 1978; Long et al, 1990).
    3) TETRODOTOXIN: Paralysis is rapid (within 2 hours); weakening of all voluntary muscles including the respiratory muscles may lead to apnea (Halstead, 1978; Oda et al, 1989).
    B) DYSPNEA
    1) WITH POISONING/EXPOSURE
    a) SCOMBROID FISH POISONING: A sensation of "chest tightness" or respiratory distress has been reported (Feldman et al, 2005; Gilbert et al, 1980; Mitchell, 1984; Sabroe & Kobza Black, 1998).
    C) BRONCHOSPASM
    1) WITH POISONING/EXPOSURE
    a) NEUROTOXIC (BREVETOXIN) SHELLFISH POISONING: Brevetoxin B may precipitate asthma attacks in susceptible individuals or cause respiratory irritation in non-asthmatics. The toxin causes an activation of sodium channels which produces contraction as a result of acetylcholine release (Watanabe et al, 1988; Shimoda et al, 1988; Richards et al, 1990; Shimoda et al, 1987).
    b) SCOMBROID FISH POISONING: Although bronchospasm and severe respiratory distress occur rarely (Halstead, 1980; Russell & Maretic, 1986), several patients have developed severe symptoms including bronchospasm (Sanchez-Guerrero et al, 1997).

Neurologic

    3.7.2) CLINICAL EFFECTS
    A) NEUROLOGICAL FINDING
    1) CLOSTRIDIUM BOTULINUM: Foodborne botulism may result in marked lassitude, weakness, and vertigo. These symptoms can be followed by progressive difficulty in speaking and swallowing, along with difficulty in breathing. Paralysis can develop. Onset: Usually, 18 to 36 hours after ingesting the toxin, but has occurred from 4 hours to 8 days. Source: A variety of foods and includes many different types of canned foods.
    a) Associated effects include respiratory impairment or failure (Beushausen T, Greve M & Ziesing S, 1994; Staiger R & Zilker T, 1994), colonic ileus (Kothare & Kassner, 1995).
    2) PARALYTIC SHELLFISH POISONING: Giddiness, dizziness, drowsiness, impaired consciousness, incoherent speech, aphasia and a feeling of lightness (ie, floating sensation) have been described after PSP (Garcia et al, 2005; HSDB , 2002; Lehane, 2001). Onset: 30 minutes after shellfish ingestion (Lehane, 2001).
    B) PARESTHESIA
    1) WITH POISONING/EXPOSURE
    a) CIGUATERA FISH POISONING: Paresthesia is a common manifestation; numbing or tingling in the extremities or circumorally occurs in over 75% of patients (Wong et al, 2008; Morris, 1990; Palafox et al, 1988).
    b) NEUROTOXIC (BREVETOXIN) SHELLFISH POISONING: Paresthesias of the face, lips, and extremities may develop after ingestion (Poli et al, 2000; Ellis, 1985; Morris et al, 1991).
    c) PARALYTIC SHELLFISH POISONING: Paresthesias and a "pins and needles" feeling may be felt (de Carvalho et al, 1998; Anon, 1976; Long et al, 1990). Numbness of the lips, tongue, and throat may occur within minutes. This may spread to the fingertips, legs, arms, and neck (Acres & Gray, 1978; Rodrigue et al, 1990; MMWR, 1991).
    d) TETRODOTOXIN: Tingling of the lips, perioral paraesthesia, and extremities may be seen as early as 10 to 30 minutes postingestion of newts or other tetrodotoxic fish (e.g., puffer fish) (Cohen et al, 2009; Eisenman et al, 2008; Chowdhury et al, 2007). This may progress to severe numbness of the extremities (Cohen et al, 2009; Halstead, 1978; Oda et al, 1989).
    C) PARALYSIS
    1) WITH POISONING/EXPOSURE
    a) CLOSTRIDIUM BOTULINUM: Foodborne botulism may result in marked lassitude, weakness, and vertigo. These symptoms can be followed by progressive difficulty in speaking and swallowing, along with difficulty in breathing. Paralysis can develop. Onset: Usually, 18 to 36 hours after ingesting the toxin, but has occurred from 4 hours to 8 days. Source: A variety of foods and includes many different types of canned foods.
    1) Associated effects include respiratory impairment or failure (Beushausen T, Greve M & Ziesing S, 1994; Staiger R & Zilker T, 1994), colonic ileus (Kothare & Kassner, 1995).
    b) PARALYTIC SHELLFISH POISONING: Respiratory failure may be seen due to paralysis of the respiratory muscle (Acres & Gray, 1978; Long et al, 1990).
    c) TETRODOTOXIN: Paralysis is rapid (within 2 hours); weakening of all voluntary muscles including the respiratory muscles may lead to apnea (Halstead, 1978; Oda et al, 1989). Tetrodotoxin blocks sodium conductance and neuronal transmission in skeletal muscles. Weakness develops first in the hands and arms and then in the legs (Bradley & Klika, 1981; CDC, 1996; Noguchi & Ebesu, 2001). Ascending paralysis may follow (Gage & Dulhunty, 1973; CDC, 1996).
    D) ATAXIA
    1) WITH POISONING/EXPOSURE
    a) NEUROTOXIC (BREVETOXIN) SHELLFISH POISONING: Weakness and/or difficulty with walking may develop after ingestion (Ellis, 1985; Morris et al, 1991).
    E) MENINGITIS
    1) WITH POISONING/EXPOSURE
    a) LISTERIA: In one series, approximately 40% of 57 adult listeriosis cases developed meningitis and/or meningoencephalitis as a result of consuming soft cheese contaminated with L. monocytogenes. Advanced age, immunocompromised status and preexisting disease(s) were present in most cases (Bula et al, 1995)
    1) Thirty percent of survivors of listeriosis-associated meningeal disease had residual neurological impairment, including cranial nerve palsies, seizures, hydrocephaly, ataxia and partial paresis (Bula et al, 1995).
    F) HEADACHE
    1) WITH POISONING/EXPOSURE
    a) CIGUATERA FISH POISONING: Severe headache may occur (Hung et al, 2005; Eastaugh, 1996).
    b) DIARRHEIC SHELLFISH POISONING: Headache may occur with DSP exposure (DeSchrijver et al, 2002).
    c) E COLI O111/CAMPYLOBACTER: Headache was a commonly reported symptom following consumption of food contaminated with E. Coli and campylobacter (Wight et al, 1997).
    d) SCOMBROID FISH POISONING: A throbbing temporal headache is common (Guly & Grant, 2006; Grinda et al, 2004; Wu & Chen, 2003).
    e) TETRODOTOXIN: Headache may develop in the early stages of poisoning (Chowdhury et al, 2007; Halstead, 1978; Sun et al, 1994).
    f) YERSINIA ENTEROCOLITICA: Headache has been reported in 61% of patients following ingestion of pasteurized milk contaminated with Yersinia enterocolitica (Ackers et al, 2000).

Gastrointestinal

    3.8.2) CLINICAL EFFECTS
    A) NAUSEA AND VOMITING
    1) WITH POISONING/EXPOSURE
    a) SUMMARY
    1) Organisms that are likely to produce early (within minutes to hours) upper gastrointestinal tract symptoms (predominantly nausea and vomiting) include the following: Anisakis simplex, Bacillus cereus, Staphylococcus aureus, Streptococcus (group A), Shigella, Salmonella spp, Kudoa septempunctata, Scombroid fish poisoning, and Vibrio parahaemolyticus. In some cases, Shigella and Listeria may take 12 or more hours to cause illness. Organisms that are likely to produce symptoms within 24 to 48 hours are Norovirus and Yersinia enterocolitica. Symptoms related to vibrio vulnificus may take a day or longer to occur and may produce bleeding under the skin unlike other foodborne illnesses.
    b) SPECIFIC ORGANISMS
    1) ANISAKIS SIMPLEX: Some individuals may develop severe abdominal pain (similar to an appendicitis) and may feel nauseous. However, most patients are diagnosed by feeling the need to cough up or vomit the nematode; usually just one nematode is recovered. Onset: 1 hour to up to 2 weeks after consuming raw or undercooked seafood (Center for Food Safety and Applied Nutrition (CFSAN), 2012)
    2) BACILLUS CEREUS: The emetic type (type 1) of food poisoning includes nausea and vomiting. Onset: 30 minutes to 6 hours. Other symptoms: Abdominal cramps and/or diarrhea may occur infrequently. Duration: Less than 24 hours. These symptoms can be similar to Staphylococcus aureus. Implicated foods: Lamb and chicken (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    3) BREVETOXINS (NEUROTOXIC SHELLFISH POISONING): Ingestion of brevetoxins may cause nausea, vomiting, and intestinal cramping (Poli et al, 2000; Ellis, 1985; Morris et al, 1991).
    4) DIARRHEIC SHELLFISH POISONING: Diarrhea is very common (Scoging & Bahl, 1998), but nausea, vomiting, and abdominal pain are also likely to occur. Onset: 30 minutes to 2 to 3 hours; complete recovery generally occurs within 72 hours (DeSchrijver et al, 2002).
    5) KUDOA SEPTEMPUNCTATA: Three patients experienced several episodes of vomiting, as well as diarrhea and abdominal pain, within 7 hours after consuming a catered meal that consisted of tempura, roast beef, rice, fried egg, grilled eel, and raw fish, including raw flounder that was aquacultured and imported from South Korea. The patients recovered with supportive care. Stool cultures were positive for normal flora only; however, testing of samples of the raw flounder from the catered meal demonstrated the presence of Kudoa septempunctata, a parasite (Iwashita et al, 2013).
    6) LISTERIA MONOCYTOGENES: Early mild symptoms may include nausea, vomiting and diarrhea and flu-like symptoms (fever). This can be followed by the serious forms of listerosis (eg, septicemia, meningitis). In some cases, illness may be limited to gastrointestinal symptoms only. Onset: Greater than 12 hours for gastrointestinal symptoms; onset for severe listerosis is unknown. Source: Raw or pasteurized milk, ice cream, raw vegetables, raw meat, raw and cooked poultry, and raw and smoked fish (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    7) NOROVIRUS: A mild, self-limited illness which can produce nausea, vomiting, diarrhea and abdominal pain. Headache and low-grade fever may be present. Onset: 24 to 48 hours after consuming contaminated food or water. Duration: 24 to 60 hours. It is a commonly reported illness in the US, but rarely causes severe illness. Source: Water (common source), shellfish and salad are often implicated foods (Centers for Disease Control and Prevention, 2010).
    8) SALMONELLA: Nausea, vomiting, abdominal cramps, diarrhea, fever and headache are the acute symptoms observed. Onset 6 to 72 hours. Duration 1 to 2 days for acute symptoms; may be prolonged in some individuals. Chronic symptoms (arthritic symptoms) may develop 3 to 4 weeks after the initial onset of acute symptoms. Sources: Raw meats, poultry, eggs, milk and dairy products, sauces and salad dressings, cake mixes and desserts. Frequency: 2 to 4 million cases annually in the US and appears to be rising (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    9) SCOMBROID FISH POISONING: Nausea, vomiting, and abdominal cramps are frequently reported (usually the presenting symptoms) (Lavon et al, 2008; Feldman et al, 2005; Grinda et al, 2004). Onset: A few minutes after consuming the implicated food. Although the effects are self-limited in most cases, symptoms may last for up to 24 hours (Borade et al, 2007).
    10) SHIGELLA: Abdominal pain, cramps, vomiting, diarrhea (stools may contain blood, pus, or mucus), fever, and tenesmus may be observed. Onset: 12 to 50 hours. Source: Salads (potato, macaroni, chicken), raw vegetables, milk and dairy products and poultry. The very young, the elderly and immunosuppressed patients may develop severe illness. Fatalities can occur with some strains and are associated with mucosal ulceration, rectal bleeding and severe dehydration (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    11) STAPHYLOCOCCUS AUREUS: Nausea, vomiting, retching, abdominal cramping and prostration are common. Onset: Symptoms may develop rapidly and are dependent on the amount of toxin ingested and the general health of the individual; some individuals may not show any signs of illness. In severe cases, alterations in blood pressure and pulse rate, muscle cramps and headache can develop. Duration: Patients usually recover in 2 days. Severe cases may take several days or longer to recover. Sources: Meats, poultry, egg products, bakery and dairy products (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    12) TETRODOTOXIN: Nausea, vomiting and epigastric pain are common signs of TTX poisoning. Vomiting may be profuse and prolonged (Cohen et al, 2009; Cavazzoni et al, 2008; Chowdhury et al, 2007).
    13) VIBRIO PARAHAEMOLYTICUS: Symptoms include watery diarrhea, abdominal cramps, nausea and vomiting and fever. Onset: 4 to 90 hours (mean 17 hours). Duration: 2 to 6 days. Sources: Undercooked or raw seafood (ie, shellfish). Outbreaks: Sporadic; episodes more likely in warmer months (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    14) YERSINIA ENTEROCOLITICA: Vomiting can develop along with abdominal pain and fever. Onset: 24 to 48 hours (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    B) DIARRHEA
    1) WITH POISONING/EXPOSURE
    a) SUMMARY
    1) Organisms that are likely to produce early (within minutes to hours) lower gastrointestinal tract symptoms (abdominal cramps and diarrhea) are likely to include the following: Bacillus cereus, Clostridium perfringens, Diarrheic shellfish poisoning, Kudoa septempunctata, Streptococcus faecalis and Salmonella spp. Organisms that are likely to produce symptoms within 18 to 36 hours are Campylobacter jejuni, E. Coli/enteropathogenic, Listeria, Norovirus, Salmonella spp., Shigella, Vibrio and Yersinia enterocolitica. Some of these organisms can produced bloody or mucoid diarrhea. Giardia and Diphyllobothrium latum are likely to produce symptoms a week or more after exposure.
    b) SPECIFIC ORGANISMS
    1) BACILLUS CEREUS: The diarrheal type (type 2) of food poisoning can mimic Clostridium perfringens. Symptoms: Watery diarrhea and abdominal cramps/pain. Nausea may be present, but vomiting is rare. Onset: 6 to 15 hours. Duration: 24 hours (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    2) CLOSTRIDIUM PERFRINGENS: Symptoms: Intense abdominal pain and diarrhea. Onset: 8 to 22 hours. Duration: 24 hours. Occasionally, symptoms may persist for 1 to 2 weeks in some individuals (ie, elderly, immunocompromised) (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    3) CAMPYLOBACTER JEJUNI: Symptoms: Usually causes watery or sticky diarrhea; may contain blood (usually occult) and fecal leukocytes. Abdominal pain, fever, nausea, headache and muscle pain may also be present. Onset: 2 to 5 days after ingesting contaminated food or water. Duration: 7 to 14 days; relapse can occur in up to 25% of cases. Source: Raw milk and chicken have been implicated (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    4) CIGUATERA FISH POISONING: Watery, nonbloody diarrhea is likely to occur (Wong et al, 2008; Achaibar et al, 2007; Ho et al, 1986; Palafox et al, 1988). In one study, the mean duration of diarrhea was 5 days (Capra et al, 1991).
    5) DIARRHEIC SHELLFISH POISONING: Diarrhea is the cardinal symptom following exposure to these toxins (Scoging & Bahl, 1998); approximately 92% of patients with DSP experience diarrhea (Edebo et al, 1988). Other symptoms can include: nausea, vomiting, and abdominal pain. Onset: 30 minutes to 2 to 3 hours; complete recovery generally occurs within 72 hours (DeSchrijver et al, 2002).
    6) DIPHYLLOBOTHRIUM LATUM: Illness due to broad fish tapeworm infection. Symptoms: Abdominal distension, diarrhea, flatulence, and intermittent abdominal cramping. Onset: Approximately, 10 days after consuming raw or insufficiently cooked fish. One outbreak reported illness after consuming sushi (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    7) ESCHERICHIA COLI organisms are listed as follows:
    a) E. COLI/ENTEROPATHOGENIC: Produces watery or bloody diarrhea. Symptoms may be prolonged in infants and lead to dehydration, electrolyte imbalance and deaths (up to 50% mortality rates in some third world countries). Source: Contaminated water is a likely source. Food implicated in outbreaks: raw chicken and beef. Onset: Unknown (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    b) E. COLI/ENTEROTOXIGENIC: Produces watery diarrhea, abdominal cramps, nausea, malaise and low-grade fever. Onset: A high infective dose may produce diarrhea in 24 hours; fewer organisms are likely needed to infect an infant. More likely to occur in areas with poor sanitation. Illness is usually self-limiting. Electrolyte replacement may be needed in infants and the elderly (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    c) E. COLI/ENTEROINVASIVE: Produces diarrhea (blood and mucus may be present) abdominal cramps, vomiting, fever, chills and malaise. It can sometimes be mistaken for Shigella spp. Onset: 12 to 72 hours. Illness is usually self-limiting. However, hemolytic uremic syndrome has occurred in some pediatric cases (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    d) E. COLI/O157:H7: Symptoms include severe abdominal pain, diarrhea (initially watery than grossly bloody) and occasionally vomiting. Illness is usually self-limited and lasts about a week. Source: Raw hamburger and raw milk have been implicated in some outbreaks. Hemolytic uremic syndrome has occurred in young children and the elderly (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    8) GIARDIA LAMBLIA: Frequent cause of nonbacterial diarrhea in the North America. Onset: Usually within 1 week of ingesting of the cyst. Duration: 2 to 6 weeks, but chronic infections can last up to months to years. Source: Most frequently due to contaminated water (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    9) KUDOA SEPTEMPUNCTATA: Diarrhea, sometimes watery, has been reported following consumption of raw olive flounder contaminated with kudoa septempunctata, a parasite. Onset generally occurs within 9 hours following consumption of the contaminated fish, with a mean duration of 4.7 hours (Iwashita et al, 2013).
    10) LISTERIA MONOCYTOGENES: Early mild symptoms may include nausea, vomiting and diarrhea and flu-like symptoms (fever). This can be followed by the serious forms of listerosis (eg, septicemia, meningitis). In some cases, illness may be limited to gastrointestinal symptoms only. Onset: Greater than 12 hours for gastrointestinal symptoms; onset for severe listerosis is unknown. Source: Raw or pasteurized milk, ice cream, raw vegetables, raw meat, raw and cooked poultry, and raw and smoked fish (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    11) NOROVIRUS: A mild, self-limited illness which can produce nausea, vomiting, diarrhea and abdominal pain. Headache and low-grade fever may be present. Onset: 24 to 48 hours after consuming contaminated food or water. Duration: 24 to 60 hours. It is a commonly reported illness in the US, but rarely causes severe illness. Source: Water (common), shellfish and salad are often implicated foods (Centers for Disease Control and Prevention, 2010).
    12) SALMONELLA: Nausea, vomiting, abdominal cramps, diarrhea, fever and headache are the acute symptoms observed. Onset: 6 to 72 hours. Duration: 1 to 2 days for acute symptoms; may be prolonged in some individuals. Chronic symptoms (arthritic symptoms) may develop 3 to 4 weeks after the initial onset of acute symptoms. Sources: Raw meats, poultry, eggs, milk and dairy products, sauces and salad dressings, cake mixes and desserts. Frequency: 2 to 4 million cases annually in the US and appears to be rising (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    13) SCOMBROID FISH POISONING: Diarrhea is a common finding after scombroid poisoning (Wu & Chen, 2003; Hall, 2003; Gilbert et al, 1980; Kerr & Parke, 1998; Anon, 2000).
    14) SHIGELLA: Abdominal pain, cramps, vomiting, diarrhea (stools may contain blood, pus, or mucus), fever, and tenesmus may be observed. Onset: 12 to 50 hours. Source: Salads (potato, macaroni, chicken), raw vegetables, milk and dairy products and poultry. The very young, the elderly and immunosuppressed patients may develop severe illness. Fatalities can occur with some strains and are associated with mucosal ulceration, rectal bleeding and severe dehydration (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    15) TETRODOTOXIN: Diarrhea may be present in the early stages of poisoning (Noguchi & Ebesu, 2001; Torda et al, 1973).
    16) VIBRIO PARAHAEMOLYTICUS: Symptoms include watery diarrhea, abdominal cramps, nausea and vomiting and fever. Onset: 4 to 90 hours; median duration: 2.5 days. Sources: Undercooked or raw seafood (ie, shellfish). Outbreaks: Episodes more likely in warmer months (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    17) VIBRIO VULNIFICUS: Illness may produce gastroenteritis (ie, diarrhea) with an onset of 16 hours after ingesting the organism. It may also produce wound infections and primary septicemia in patients with underlying chronic disease. This infection may be fatal in patients with liver disease or a compromised immune system. Sources: Undercooked or raw seafood (ie, shellfish (oysters). Outbreaks: Sporadic cases; episodes are more likely in warmer months (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    18) YERSINIA ENTEROCOLITICA: Hallmark symptoms include abdominal pain and fever; diarrhea (in up to 80% of patients) and vomiting may also develop. Onset: 24 to 48 hours after ingestion; typical vehicle food and/or drink. Sources: Meats, oysters, fish, and raw milk (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    C) CONSTIPATION
    1) WITH POISONING/EXPOSURE
    a) CLOSTRIDIUM BOTULINUM/INFANT BOTULISM: Symptoms: Constipation that occurs after a period of normal infant development. Poor feeding, loss of head control (may be pronounced), lethargy, and weakness may also be observed (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    b) CLOSTRIDIUM BOTULINUM/FOODBORNE: Symptoms: Abdominal distension and constipation are relatively common findings along with neurologic symptoms (ie, lassitude, progressive weakness, paralysis). Onset: Usually, 18 to 36 hours; may occur as early as 4 hours to 8 days (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    D) ABDOMINAL PAIN
    1) WITH POISONING/EXPOSURE
    a) YERSINIA ENTEROCOLITICA: Hallmark symptoms include abdominal pain and fever; diarrhea (in up to 80% of patients) and vomiting may also develop. Onset: 24 to 48 hours after ingestion; typical vehicle food and/or drink (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    b) ANISAKIS SIMPLEX: Some individuals may develop severe abdominal pain (similar to an appendicitis) and may feel nauseous. However, most patients are diagnosed by feeling the need to cough up or vomit the nematode; usually just one nematode is recovered. Onset: 1 hour to up to 2 weeks after consuming raw or undercooked seafood (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    c) KUDOA SEPTEMPUNCTATA: Abdominal pain, as well as several episodes of vomiting, occurred in a 61-year-old woman within 7 hours after ingesting raw olive flounder contaminated with kudoa septempunctata, a parasite. The patient's symptoms resolved with supportive care (Iwashita et al, 2013).
    d) NOROVIRUS: A mild, self-limited illness which can produce nausea, vomiting, diarrhea and abdominal pain. Headache and low-grade fever may be present. Onset: 24 to 48 hours after consuming contaminated food or water. Duration: 24 to 60 hours. It is a commonly reported illness in the US, but rarely causes severe illness. Source: Water (common), shellfish and salad are often implicated foods (Centers for Disease Control and Prevention, 2010).
    E) INTESTINAL OBSTRUCTION
    1) WITH POISONING/EXPOSURE
    a) CLOSTRIDIUM BOTULINUM: Colonic ileus has been reported in infants following ingestion of honey contaminated with Clostridium botulinum spores (Kothare & Kassner, 1995). Constipation has been reported in adult cases (Roblot et al, 1994).
    F) RECTAL HEMORRHAGE
    1) WITH POISONING/EXPOSURE
    a) SHIGELLA: Abdominal pain, cramps, vomiting, diarrhea (stools may contain blood, pus, or mucus), fever, and tenesmus may be observed. Onset: 12 to 50 hours. Source: Salads (potato, macaroni, chicken), raw vegetables, milk and dairy products and poultry. The very young, the elderly and immunosuppressed patients may develop severe illness. Fatalities can occur with some strains and are associated with mucosal ulceration, rectal bleeding and severe dehydration (Center for Food Safety and Applied Nutrition (CFSAN), 2012).

Genitourinary

    3.10.2) CLINICAL EFFECTS
    A) URINARY TRACT INFECTIOUS DISEASE
    1) WITH POISONING/EXPOSURE
    a) YERSINIA ENTEROCOLITICA: Typically presents as a gastroenteritis, but the bacteria may cause infections of the urinary tract (Center for Food Safety and Applied Nutrition (CFSAN), 2012).

Acid-Base

    3.11.2) CLINICAL EFFECTS
    A) ACIDOSIS
    1) ESCHERICHIA COLI, Enterotoxigenic strains: Metabolic acidosis secondary to severe, prolonged diarrhea may occur (APHA, 1995)

Dermatologic

    3.14.2) CLINICAL EFFECTS
    A) SKIN ULCER
    1) WITH POISONING/EXPOSURE
    a) Vibrio vulnificus may produce bleeding under the skin and ulcers that may require surgical debridement (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    B) ITCHING OF SKIN
    1) WITH POISONING/EXPOSURE
    a) CIGUATERA FISH POISONING: Pruritus occurs in about 50% of cases, often developing more than 30 hours from time of ingestion, and may last for weeks (Chateau-Degat et al, 2007; Keynan & Pottesman, 2004).
    b) SCOMBROID FISH POISONING: Pruritus or a burning sensation is often described (Lavon et al, 2008; Kim, 1979; Russell & Maretic, 1986).
    C) ERUPTION
    1) WITH POISONING/EXPOSURE
    a) SCOMBROID FISH POISONING: An erythematous rash is a frequent finding (Grinda et al, 2004; Wu & Chen, 2003). Itching or pain do not always accompany rash (Borade et al, 2007).
    D) BULLOUS ERUPTION
    1) WITH POISONING/EXPOSURE
    a) TETRODOTOXIN: Blistering, petechiae, and desquamation have been reported in the later stages of TTX poisoning (Noguchi & Ebesu, 2001; Leber, 1972).
    E) EXCESSIVE SWEATING
    1) WITH POISONING/EXPOSURE
    a) TETRODOTOXIN: Diaphoresis is a common early symptom of TTX poisoning (Noguchi & Ebesu, 2001).
    F) FLUSHING
    1) WITH POISONING/EXPOSURE
    a) SCOMBROID FISH POISONING: Facial flushing or "feverish feeling" may develop (Lavon et al, 2008; Wu & Chen, 2003).

Musculoskeletal

    3.15.2) CLINICAL EFFECTS
    A) JOINT PAIN
    1) WITH POISONING/EXPOSURE
    a) CIGUATERA FISH POISONING: Arthralgias and myalgias are common presenting symptoms (Gatti et al, 2008; Miller et al, 1999; Palafox et al, 1988). Weakness in the extremities, vertigo, and ataxia are common, and last 12 hours to 10 days.
    b) SALMONELLA: Following acute gastrointestinal symptoms, some individuals may develop chronic arthritic symptoms about 3 to 4 weeks after the initial onset of acute symptoms (Center for Food Safety and Applied Nutrition (CFSAN), 2012).

Monitoring Parameters Levels

    4.1.1) SUMMARY
    A) In the vast majority of patients with food poisoning, no laboratory evaluation is necessary and most cases can be managed symptomatically.
    B) Obtain serum electrolytes and CBC, if patients have a severe or prolonged course, have significant comorbid disease, or have symptoms suggestive of an alternative diagnosis.
    C) Stool analysis may offer clues to the etiology of the organism, however, treatment should not be delayed to confirm the diagnosis.

Methods

    A) BACTERIAL FOODBORNE ILLNESS
    1) Cultures and/or other methods that may assist in diagnosis:
    a) AEROMONAS HYDROPHILIA: Culture of stool, blood (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    b) BACILLUS CEREUS: Stool, food, vomitus (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    c) CAMPYLOBACTER JEJUNI: Stool (Center for Food Safety and Applied Nutrition (CFSAN), 2009).
    d) CLOSTRIDIUM BOTULINUM: Often diagnosed by clinical symptoms; presence of toxin in the serum or feces or implicated food or presence of toxin or C. botulinum in feces, tissues, or gastric aspirates useful in infant botulism. Most sensitive and widely used: mouse neutralization test (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    e) CLOSTRIDIUM PERFRINGENS: Diagnosis can be confirmed by detecting the toxin in the stool; bacteriological confirmation of implicated foods or stool (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    f) CRONOBACTER: Culture of tissue, blood, CSF, urine (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    g) ENTEROCOCCUS: Culture of stool, blood or food (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    h) ESCHERICHIA COLI: Food, water, stool (Center for Food Safety and Applied Nutrition (CFSAN), 2009).
    i) LISTERIA: Culture from the blood, CSF, or stool (stool culture may be difficult and of limited value) (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    j) PLESIOMONAS SHIGELLOIDES: Stool culture (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    k) SALMONELLOSIS: Culture organism isolated from stool (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    l) SHIGELLOSIS: Culture organism isolated from stool (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    m) STAPHYLOCOCCAL AUREUS: Serological methods that can identify enterotoxigenicity of S. aureus in food. Phage typing may also be used to isolate organism from food, stool or a suspected food handler (ie, possible carrier) (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    n) STREPTOCOCCAL/GROUP A: Throat swabs, or culture of blood or implicated food (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    o) TYPHOID FEVER (Salmonella Typhi): Stool (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    p) VIBRIO CHOLERA 01 OR 0139: Stool culture (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    q) VIBRIO CHOLERA NON- 01 AND NON-0139: Culture of stool, blood (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    r) VIBRIO PARAHAEMOLYTICUS: Culture stool (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    s) VIBRIO VULNIFICUS: Culture wound, stool or blood (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    t) YERSINIA ENTEROCOLITICA: Isolation of the organism from the feces, blood or vomit and/or serological identification of the organism from the host or implicated food (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    B) VIRAL FOODBORNE ILLNESS
    1) ASTROVIRUSES: Identification of virus in stool using immune electron microscopy or reverse transcriptase polymerase chain reaction. Detection of antibodies in serum (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    2) HEPATITIS A: Detection of anti-hepatitis A antibodies (IgM or IgG), detection of virus using immunoelectron microscopy, or reverse transcription polymerase chain reaction (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    3) NOROVIRUS: Specific diagnosis of the disease can only be performed by a few laboratories that posses reagents from human volunteer studies. Identification of the virus can be made on early stool specimens using immune electron microscopy and various immunoassays. Confirmation usually requires demonstration of seroconversion, the presence of specific IgM antibody, of a 4-fold rise in antibody titer to Norwalk virus on paired acute-convalescent sera (Centers for Disease Control and Prevention, 2010).
    4) ROTAVIRUS: Usually diagnosed by clinical signs and symptoms. Enzyme immunoassays (EIA) and latex agglutinations (LA) can identify virus in stool (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    5) SAPOVIRUSES: Identification of virus in stool using immune electron microscopy or reverse transcriptase polymerase chain reaction (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    C) PROTOZOA AND PARASITES
    1) ANISAKIASIS: No ova in stool; patient may vomit a worm (morphological exam of nematode) (Center for Food Safety and Applied Nutrition (CFSAN), 2009).
    2) CRYPTOSPORIDIUM SPECIES: Identification of oocysts in feces (Center for Food Safety and Applied Nutrition (CFSAN), 2012)
    3) CYCLOSPORA CAYETANENSIS: Identification of parasite in stool (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    4) DIPHYLLOBOTHRIASIS: Ova (eggs) or worm in stool (Center for Food Safety and Applied Nutrition (CFSAN), 2009).
    5) ENTAMOEBA HISTOLYTICA: Identification of cysts and trophozoites is stool (difficult to distinguish from non-pathogenic E dispar and E moshkovskii. Biopsy and detection of antibodies in serum are alternatives (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    6) EUSTRONGYLIDES SPECIES: Worm usually identified at surgery for abdominal pain (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    7) GIARDIA: Trophozoite or cysts in stools visualized by using stained or unstained wet mounts; one ELISA test can detect excretory secretory products of the organism (Center for Food Safety and Applied Nutrition (CFSAN), 2009).
    8) NANOPHYETUS SALMINCOLA: Detection of eggs in stool (Center for Food Safety and Applied Nutrition (CFSAN), 2012).
    9) TRICHINOSIS (Trichinella Spiralis): Muscle biopsy or serum antibodies (Centers for Disease Control and Prevention, 2012).

Life Support

    A) Support respiratory and cardiovascular function.

Patient Disposition

    6.3.1) DISPOSITION/ORAL EXPOSURE
    6.3.1.1) ADMISSION CRITERIA/ORAL
    A) Patients with muscle paralysis or weakness suggestive of Clostridium botulism or other paralytic toxin ingestion should be admitted. Those that have persistent vomiting and diarrhea despite supportive care should be admitted.
    6.3.1.2) HOME CRITERIA/ORAL
    A) Many patients do well with oral rehydration and can be managed at home.
    6.3.1.3) CONSULT CRITERIA/ORAL
    A) A toxicologist should be consulted in cases of suspected botulism. Infectious disease should be consulted for aid in determining the responsible organism in cases of traveler's diarrhea of when symptoms do not respond to initial therapy.
    6.3.1.5) OBSERVATION CRITERIA/ORAL
    A) Patients with intractable vomiting, severe pain, or significant underlying illness may require referral for medical treatment. A patient can be discharged when they are tolerating oral fluids without vomiting and vital signs are within normal limits.

Monitoring

    A) In the vast majority of patients with food poisoning, no laboratory evaluation is necessary and most cases can be managed symptomatically.
    B) Obtain serum electrolytes and CBC, if patients have a severe or prolonged course, have significant comorbid disease, or have symptoms suggestive of an alternative diagnosis.
    C) Stool analysis may offer clues to the etiology of the organism, however, treatment should not be delayed to confirm the diagnosis.

Oral Exposure

    6.5.1) PREVENTION OF ABSORPTION/PREHOSPITAL
    A) SUMMARY
    1) Most bacterial food poisoning episodes are self-limiting and do NOT require hospitalization. Decontamination is not indicated in the prehospital setting.
    6.5.2) PREVENTION OF ABSORPTION
    A) SUMMARY
    1) Activated charcoal is NOT recommended in most other types of food poisoning due to the presence of nausea and vomiting. Activated charcoal is recommended for treatment of botulinum exposure since it may bind type A botulinum toxin in the gut.
    a) BOTULINUM/ANIMAL DATA: Activated charcoal administered to mice prior to intraperitoneal injection with botulinum toxin significantly reduced morbidity and mortality (Gomez et al, 1995). Although efficacy of activated charcoal administration after ingestion of botulinum toxin in humans is not known, it may be beneficial in inactivating type A botulinum toxin and is recommended for treatment.
    2) CHARCOAL ADMINISTRATION
    a) Consider administration of activated charcoal after a potentially toxic ingestion (Chyka et al, 2005). Administer charcoal as an aqueous slurry; most effective when administered within one hour of ingestion.
    3) CHARCOAL DOSE
    a) Use a minimum of 240 milliliters of water per 30 grams charcoal (FDA, 1985). Optimum dose not established; usual dose is 25 to 100 grams in adults and adolescents; 25 to 50 grams in children aged 1 to 12 years (or 0.5 to 1 gram/kilogram body weight) ; and 0.5 to 1 gram/kilogram in infants up to 1 year old (Chyka et al, 2005).
    1) Routine use of a cathartic with activated charcoal is NOT recommended as there is no evidence that cathartics reduce drug absorption and cathartics are known to cause adverse effects such as nausea, vomiting, abdominal cramps, electrolyte imbalances and occasionally hypotension (None Listed, 2004).
    b) ADVERSE EFFECTS/CONTRAINDICATIONS
    1) Complications: emesis, aspiration (Chyka et al, 2005). Aspiration may be complicated by acute respiratory failure, ARDS, bronchiolitis obliterans or chronic lung disease (Golej et al, 2001; Graff et al, 2002; Pollack et al, 1981; Harris & Filandrinos, 1993; Elliot et al, 1989; Rau et al, 1988; Golej et al, 2001; Graff et al, 2002). Refer to the ACTIVATED CHARCOAL/TREATMENT management for further information.
    2) Contraindications: unprotected airway (increases risk/severity of aspiration) , nonfunctioning gastrointestinal tract, uncontrolled vomiting, and ingestion of most hydrocarbons (Chyka et al, 2005).
    6.5.3) TREATMENT
    A) SUPPORT
    1) Most bacterial food poisoning episodes are self-limiting and do not require hospitalization or specific therapy, other than oral fluid replacement. Patients with severe manifestations may require identification of the infectious organism and specific antibiotic therapy.
    2) FLUID AND ELECTROLYTE REPLACEMENT: Intravenous fluids are indicated in patients who cannot retain oral fluids and in patients with severe fluid/electrolyte imbalance. Rehydrate and provide electrolytes if needed, especially in children and elderly patients.
    3) ANTIDIARRHEAL AGENTS: These agents may be considered (ADULT: Loperamide 4 mg orally followed by 2 mg following each loose stool; maximum: 16 mg/day. CHILD (age 2 to 5 years): 1 mg orally followed by 1 mg after each loose stool; maximum: 3 mg/day; CHILD (age 6 to 8 years): 2 mg orally followed by 1 mg after each loose stool; maximum: 4 mg/day; and CHILD (8 to 12 years): 2 mg orally followed by 1 mg after each loose stool; maximum: 6 mg/day.
    a) TRAVELER'S DIARRHEA: Cases of traveler's diarrhea should be treated with antibiotics depending on the organism suspected. Ciprofloxacin: ADULT: 500 mg orally twice daily for 3 days; CHILD: 10 to 20 mg/kg orally twice daily for 3 days OR Trimethoprim/Sulfamethoxazole: ADULT: 160/800 mg orally twice daily for 5 days; CHILD: 4 to 5 mg/kg orally twice daily for 3 days.
    4) OTHER THERAPIES: Antibiotics may be indicated in some types of bacterial food poisoning. Antitoxin is indicated in cases of foodborne botulism.
    B) MONITORING OF PATIENT
    1) In the vast majority of patients with food poisoning, no laboratory evaluation is necessary and most cases can be managed symptomatically.
    2) Obtain serum electrolytes and CBC, if patients have a severe or prolonged course, have significant comorbid disease, or have symptoms suggestive of an alternative diagnosis.
    3) Stool analysis may offer clues to the etiology of the organism, however, treatment should not be delayed to confirm the diagnosis.
    4) Monitor patients with neurologic signs closely for respiratory depression or distress.
    C) AIRWAY MANAGEMENT
    1) Airway protection and management should be considered in any patient with paralytic symptoms.
    2) BOTULISM: The mainstay of botulism therapy is early, aggressive respiratory support in an intensive care unit. Precipitous respiratory failure is the greatest life threat. Close observation and assessment of vital capacity are essential. Consideration should be given to early or elective intubation. Patients with type A botulism are most likely to require ventilatory support (Center for Food Safety and Applied Nutrition (CFSAN), 2009; Woodruff et al, 1992; Hughes et al, 1981; MacDonald et al, 1985).
    D) ANTIEMETIC
    1) Administer antiemetics liberally.
    E) ANTIBIOTIC
    1) Antibiotics may be indicated for the following bacterial food poisonings:
    a) CAMPYLOBACTER JEJUNI
    1) ERYTHROMYCIN: INDICATIONS: A drug of choice for Campylobacter gastroenteritis (clinical dysentery); must be started within 3 to 4 days of symptom onset (Dupont et al, 1991; Ashkenazi & Cleary, 1991; Pickering, 1991).
    a) DOSE: ADULT: 500 mg orally every 6 hours for 5 to 7 days; PEDIATRIC: 40 to 50 mg/kg/day orally in 4 divided doses for 5 to 7 days (Dupont et al, 1991; Grisanti & Jaffe, 1991).
    2) CIPROFLOXACIN: INDICATIONS: A drug of choice for Campylobacter gastroenteritis (clinical dysentery) in adults (Med Lett, 1990; Dupont et al, 1991).
    a) DOSE: ADULT: 500 mg orally twice a day for 3 to 5 days (Dupont et al, 1991).
    b) SALMONELLA (See FOODBORNE ILLNESS-SALMONELLA for further treatment information)
    1) ANTIBIOTIC THERAPY: The use of antibiotics in patients with salmonellosis may increase the risk of the occurrence of bacteremia. Antibiotics are not indicated for diseases limited to the gastrointestinal tract because it may lead to the emergence of resistant organisms. Systemic antibiotic therapy is indicated for diseases caused by Salmonella typhosa, life-threatening diseases outside the gastrointestinal tract, for chronically ill patients, young children, and debilitated adults. Trimethoprim/sulfamethoxazole or quinolones are generally the drugs of choice.
    a) CIPROFLOXACIN: ADULT DOSE: 500 mg orally twice daily for 5 to 7 days (14 days if immunocompromised). Contraindicated if the patient is less than 16 years of age or pregnant.
    b) TRIMETHOPRIM AND SULFAMETHOXAZOLE: ADULT DOSE: 160 mg trimethoprim and 800 mg sulfamethoxazole orally twice daily for 5 to 7 days (14 days if immunocompromised). PEDIATRIC DOSE: 5 mg/kg trimethoprim and 25 mg/kg sulfamethoxazole orally twice daily for 5 to 7 days (14 days if immunocompromised).
    c) CEFTRIAXONE: ADULT DOSE: 100 mg/kg of body weight/day in 1 or 2 divided doses.
    c) SHIGELLA (See FOODBORNE ILLNESS-SHIGELLA for further treatment information)
    1) ANTIBIOTIC THERAPY: Microbial resistance is common. Although shigellosis is a self-limited disease, antibiotic treatment has been shown to decrease the duration of illness and person-to-person spread. Treatment with antibiotics should be considered in patients with severe symptoms, profound dehydration, electrolyte abnormalities, and grossly bloody stool. Fluoroquinolones, azithromycin, ceftriaxone, and cefixime are the drugs of choice when susceptibilities are unknown.
    a) CIPROFLOXACIN: DOSE: ADULTS: 500 mg orally twice daily for 5 days. CHILDREN: Avoid unless other therapies are contraindicated.
    b) AZITHROMYCIN: DOSE: ADULTS: 500 mg orally on day 1 followed by 250 mg orally daily for days 2 to 5. CHILDREN: 12 mg/kg orally as a single dose on day 1, followed by 6 mg/kg orally daily for days 2 to 5.
    c) CEFIXIME: DOSE: ADULTS: 400 mg/day orally daily. CHILDREN: 8 mg/kg/day orally in 2 divided doses.
    d) CEFTRIAXONE: DOSE: ADULTS: 1 to 2 g IV or IM daily. CHILDREN: 50 mg/day IV or IM as single dose for 3 days.
    e) Treatment with ampicillin and trimethoprim-sulfamethoxazole (TMP-SMX) is generally not recommended in cases where susceptibilities are unknown due to widespread microbial resistance.
    d) STREPTOCOCCAL (See FOODBORNE ILLNESS-STREPTOCOCCAL for further treatment information)
    1) ANTIBIOTIC THERAPY: Penicillin is the drug of choice for treatment of streptococcal pharyngitis. For patients allergic to penicillin, a narrow-spectrum cephalosporin (eg, cephalexin, cefadroxil) if the patient does not have a type I hypersensitivity to penicillin, clindamycin, or a macrolide antibiotic (ie, azithromycin, clarithromycin) may be alternative choices.
    a) PENICILLIN V: ADULT DOSE: 500 mg orally 2 or 3 times daily for 10 days. PEDIATRIC DOSE: (27 kg or less) 250 mg orally 2 or 3 times daily for 10 days; (greater than 27 kg) 500 mg orally 2 or 3 times daily for 10 days.
    b) CEPHALEXIN: ADULT DOSE: 500 mg orally every 12 hours for 10 days. PEDIATRIC DOSE: (greater than 1 year of age) 25 to 50 mg/kg/day orally in 2 divided doses for 10 days.
    c) CEFADROXIL: ADULT DOSE: 1 g/day orally in 1 or 2 divided doses for 10 days. PEDIATRIC DOSE: 30 mg/kg/day orally in a single dose or in divided doses every 12 hours for 10 days.
    d) CLINDAMYCIN: ADULT AND PEDIATRIC DOSE: 20 mg/kg/day orally in 3 divided doses, up to a maximum of 1.8 g/day, for 10 days.
    e) AZITHROMYCIN: ADULT DOSE: 500 mg orally as a single dose on day 1, then 250 mg orally once daily on days 2 through 5. PEDIATRIC DOSE: 12 mg/kg once daily, up to a maximum daily dose of 500 mg, for 5 days.
    f) CLARITHROMYCIN: ADULT DOSE: 250 mg orally every 12 hours for 10 days. PEDIATRIC DOSE: 15 mg/kg/day orally in 2 divided doses (maximum 250 mg twice daily) for 10 days.
    e) LISTERIA (See FOODBORNE ILLNESS-LISTERIA for further treatment information)
    1) ANTIBIOTIC THERAPY: Ampicillin is the recognized drug of choice against listerial bacteremia (Wilkinson & Keate, 1984; Rapp et al, 1984) .
    a) AMPICILLIN: DOSE: ADULTS and CHILDREN: 200 mg/kg/day every 6 hours IV for a minimum of 14 days (Hoepich, 1991; Lorber, 1997).
    b) GENTAMICIN: It may added to the ampicillin regimen for the treatment of patients with bacteremia or those severely immunocompromised, or the diagnosis of meningitis, brain abscess, or endocarditis (Lorber, 1997).
    c) TRIMETHOPRIM-SULFAMETHOXAZOLE: Recommended as alternate therapy in adults for the treatment of presumptive infections due to Listeria monocytogenes or Escherichia coli meningitis (Tunkel et al, 2004).
    d) OTHER ANTIBIOTICS: Cefazolin sodium and erythromycin have both been used successfully to treat Listeria bacteremia (Holoshitz et al, 1984), but failure with these drugs has also been reported (Kawler & Hof, 1984). Chloramphenicol has also been successfully used in some meningitis patients who did not respond to ampicillin, even though the cultures were sensitive to ampicillin (Hearmon & Ghosh, 1989).
    f) VIBRIO
    1) ANTIBIOTIC THERAPY: Although volume and fluid replacement is mainstay of therapy, antibiotic treatment decreases duration of illness, requirement for fluid replacement, and period of Vibrio excretion (WHO, 1991).
    a) DRUGS OF CHOICE: Tetracycline (or doxycycline) is drug of choice; alternatives include trimethoprim-sulfamethoxazole, ciprofloxacin, norfloxacin, erythromycin, and furazolidone (Med Lett, 1990; CDC, 1991; WHO, 1991; Swerdlow & Ries, 1992).
    F) DISEASE CAUSED BY PARASITE
    1) CRYPTOSPORIDIUM
    a) Usually a self-limited illness. Nitazoxanide is indicated for the treatment of diarrhea caused by Cryptosporidium parvum in adults and children (Prod Info Alinia (R), 2005). In severe cases, paromomycin has also been recommended for adults (American Medical Association et al, 2004).
    b) NITAZOXANIDE: ADULTS: 500 mg (1 tablet or 25 mL suspension) orally every 12 hours for 3 days. CHILDREN: (age 1 to 3 yr) 100 mg (5 mL) orally every 12 hours for 3 days; (age 4 to 11 yr) 200 mg (10 mL) orally every 12 hours for 3 days; (age 12 yr and older) 500 mg (1 tablet or 25 mL suspension) orally every 12 hours for 3 days (Prod Info Alinia (R), 2005).
    c) PAROMOMYCIN: If severe ADULTS: Paromomycin 500 mg 4 times daily for 3 to 6 weeks (Hewitt et al, 2000).
    1) Some clinical studies claim no difference in response between paromomycin versus placebo after 3 or 6 weeks (Hewitt et al, 2000), while response rates of nearly 50% reported in HIV patients (Flanigan et al, 1996). Although not curative, paromomycin treatment appears to offer symptomatic relief in this patient population (Flanigan et al, 1996).
    2) CYCLOSPORA CAYETANENSIS
    a) Treatment with trimethoprim/sulfamethoxazole has been recommended (American Medical Association et al, 2004).
    b) ADULT: Sulfamethoxazole 800 mg/trimethoprim 160 mg four times daily for 10 days followed by prophylaxis with 1 tablet 3 times weekly (Pape et al, 1994).
    3) DIPHYLLOBOTHRIASIS
    a) PRAZIQUANTEL: A single dose of praziquantel 5 to 10 mg/kg is efficacious (greater than 95% rate of cure) in the treatment of diphyllobothriasis (Schantz, 1996).
    b) NICLOSAMIDE: DOSE: ADULTS: Given as a single 2 g dose (4 tablets) for the treatment of Diphyllobothrium latum. CHILDREN: 1 g (2 tablets) in children weighing 11 to 34 kg, and 1.5 g (3 tablets) in children weighing more than 34 kg (Schantz, 1996; Anon, 1992).
    4) ENTAMOEBA HISTOLYTICA
    a) Treatment with metronidazole and either iodoquinol or paromomycin has been recommended (American Medical Association et al, 2004).
    b) ADULTS: Metronidazole 750 mg orally 3 times daily for 5 to 10 days (Prod Info FLAGYL(R) oral tablets, 2010) and either iodoquinol 630 or 650 mg orally 3 times daily for 20 days (Prod Info Yodoxin(R) oral tablets, 2010) OR paromomycin 25 to 35 mg/kg/day orally divided 3 times daily for 5 to 10 days (Prod Info Humatin(R), 2001).
    c) CHILDREN: Metronidazole 35 to 50 mg/kg/day orally in 3 divided doses for 10 days (Prod Info FLAGYL(R) oral tablets, 2010) and either iodoquinol 10 to 13.3 mg/kg 3 times day for 20 days up to a maximum of 1.95 grams/day (Prod Info Yodoxin(R) oral tablets, 2010) OR paromomycin 25 to 35 mg/kg/day orally divided 3 times daily for 5 to 10 days (Prod Info Humatin(R), 2001).
    5) GIARDIA
    a) METRONIDAZOLE: It is considered by many to be the drug of choice in giardiasis due to its similar efficacy and lower degree of toxicity as compared to quinacrine. ADULT DOSE: 250 mg orally 3 times a day for 5 days (Anon, 1993).
    b) TINIDAZOLE: It is indicated for the treatment of giardiasis caused by G Duodenalis (G lamblia) in adults and children (Prod Info TINDAMAX(R) oral tablets, 2007).
    1) ADULT: DOSE: 2 g orally, one dose. Administer with food to minimize gastrointestinal side effects (Prod Info TINDAMAX(R) oral tablets, 2007).
    2) PEDIATRIC: DOSE: CHILDREN OLDER THAN 3 YEARS: 50 mg/kg (up to 2 g), one dose. Administer with food to minimize gastrointestinal side effects (Prod Info TINDAMAX(R) oral tablets, 2007).
    c) NITAZOXANIDE: ADULT: 500 mg (1 tablet or 25 mL suspension) orally every 12 hr with food for 3 days. PEDIATRIC DOSE: CHILDREN 1 to 3 years: 100 mg (5 mL) orally every 12 hr with food for 3 days; CHILDREN 4 TO 11 years: 200 mg (10 mL) orally every 12 hr with food for 3 days; CHILDREN 12 YEARS AND OLDER: 500 mg (1 tablet or 25 mL suspension) orally every 12 hr with food for 3 days (Prod Info Alinia (R), 2005).
    d) QUINACRINE: This agent has also been used, but is no longer available in the US.
    6) TRICHINELLOSIS
    a) ALBENDAZOLE: ADULTS AND CHILDREN: 400 mg twice daily orally for 8 to 14 days (Centers for Disease Control and Prevention, 2012).
    b) MEBENDAZOLE: ADULTS AND CHILDREN: 200 to 400 mg 3 times daily orally for 3 days, then 400 to 500 mg 3 times daily orally for 10 days (Centers for Disease Control and Prevention, 2012).
    G) SEIZURE
    1) SUMMARY
    a) Seizures should be treated with benzodiazepines as first line therapy (lorazepam 0.05 mg/kg or diazepam 0.1 mg/kg). If seizures are felt to be due to hyponatremia, the patient should be given hypertonic saline (3% saline 1 to 2 mL/kg bolus).
    b) SUMMARY
    1) Attempt initial control with a benzodiazepine (eg, diazepam, lorazepam). If seizures persist or recur, administer phenobarbital or propofol.
    2) Monitor for respiratory depression, hypotension, and dysrhythmias. Endotracheal intubation should be performed in patients with persistent seizures.
    3) Evaluate for hypoxia, electrolyte disturbances, and hypoglycemia (or, if immediate bedside glucose testing is not available, treat with intravenous dextrose).
    c) DIAZEPAM
    1) ADULT DOSE: Initially 5 to 10 mg IV, OR 0.15 mg/kg IV up to 10 mg per dose up to a rate of 5 mg/minute; may be repeated every 5 to 20 minutes as needed (Brophy et al, 2012; Prod Info diazepam IM, IV injection, 2008; Manno, 2003).
    2) PEDIATRIC DOSE: 0.1 to 0.5 mg/kg IV over 2 to 5 minutes; up to a maximum of 10 mg/dose. May repeat dose every 5 to 10 minutes as needed (Loddenkemper & Goodkin, 2011; Hegenbarth & American Academy of Pediatrics Committee on Drugs, 2008).
    3) Monitor for hypotension, respiratory depression, and the need for endotracheal intubation. Consider a second agent if seizures persist or recur after repeated doses of diazepam .
    d) NO INTRAVENOUS ACCESS
    1) DIAZEPAM may be given rectally or intramuscularly (Manno, 2003). RECTAL DOSE: CHILD: Greater than 12 years: 0.2 mg/kg; 6 to 11 years: 0.3 mg/kg; 2 to 5 years: 0.5 mg/kg (Brophy et al, 2012).
    2) MIDAZOLAM has been used intramuscularly and intranasally, particularly in children when intravenous access has not been established. ADULT DOSE: 0.2 mg/kg IM, up to a maximum dose of 10 mg (Brophy et al, 2012). PEDIATRIC DOSE: INTRAMUSCULAR: 0.2 mg/kg IM, up to a maximum dose of 7 mg (Chamberlain et al, 1997) OR 10 mg IM (weight greater than 40 kg); 5 mg IM (weight 13 to 40 kg); INTRANASAL: 0.2 to 0.5 mg/kg up to a maximum of 10 mg/dose (Loddenkemper & Goodkin, 2011; Brophy et al, 2012). BUCCAL midazolam, 10 mg, has been used in adolescents and older children (5-years-old or more) to control seizures when intravenous access was not established (Scott et al, 1999).
    e) LORAZEPAM
    1) MAXIMUM RATE: The rate of intravenous administration of lorazepam should not exceed 2 mg/min (Brophy et al, 2012; Prod Info lorazepam IM, IV injection, 2008).
    2) ADULT DOSE: 2 to 4 mg IV initially; repeat every 5 to 10 minutes as needed, if seizures persist (Manno, 2003; Brophy et al, 2012).
    3) PEDIATRIC DOSE: 0.05 to 0.1 mg/kg IV over 2 to 5 minutes, up to a maximum of 4 mg/dose; may repeat in 5 to 15 minutes as needed, if seizures continue (Brophy et al, 2012; Loddenkemper & Goodkin, 2011; Hegenbarth & American Academy of Pediatrics Committee on Drugs, 2008; Sreenath et al, 2010; Chin et al, 2008).
    f) PHENOBARBITAL
    1) ADULT LOADING DOSE: 20 mg/kg IV at an infusion rate of 50 to 100 mg/minute IV. An additional 5 to 10 mg/kg dose may be given 10 minutes after loading infusion if seizures persist or recur (Brophy et al, 2012).
    2) Patients receiving high doses will require endotracheal intubation and may require vasopressor support (Brophy et al, 2012).
    3) PEDIATRIC LOADING DOSE: 20 mg/kg may be given as single or divided application (2 mg/kg/minute in children weighing less than 40 kg up to 100 mg/min in children weighing greater than 40 kg). A plasma concentration of about 20 mg/L will be achieved by this dose (Loddenkemper & Goodkin, 2011).
    4) REPEAT PEDIATRIC DOSE: Repeat doses of 5 to 20 mg/kg may be given every 15 to 20 minutes if seizures persist, with cardiorespiratory monitoring (Loddenkemper & Goodkin, 2011).
    5) MONITOR: For hypotension, respiratory depression, and the need for endotracheal intubation (Loddenkemper & Goodkin, 2011; Manno, 2003).
    6) SERUM CONCENTRATION MONITORING: Monitor serum concentrations over the next 12 to 24 hours. Therapeutic serum concentrations of phenobarbital range from 10 to 40 mcg/mL, although the optimal plasma concentration for some individuals may vary outside this range (Hvidberg & Dam, 1976; Choonara & Rane, 1990; AMA Department of Drugs, 1992).
    g) OTHER AGENTS
    1) If seizures persist after phenobarbital, propofol or pentobarbital infusion, or neuromuscular paralysis with general anesthesia (isoflurane) and continuous EEG monitoring should be considered (Manno, 2003). Other anticonvulsants can be considered (eg, valproate sodium, levetiracetam, lacosamide, topiramate) if seizures persist or recur; however, there is very little data regarding their use in toxin induced seizures, controlled trials are not available to define the optimal dosage ranges for these agents in status epilepticus (Brophy et al, 2012):
    a) VALPROATE SODIUM: ADULT DOSE: An initial dose of 20 to 40 mg/kg IV, at a rate of 3 to 6 mg/kg/minute; may give an additional dose of 20 mg/kg 10 minutes after loading infusion. PEDIATRIC DOSE: 1.5 to 3 mg/kg/minute (Brophy et al, 2012).
    b) LEVETIRACETAM: ADULT DOSE: 1000 to 3000 mg IV, at a rate of 2 to 5 mg/kg/min IV. PEDIATRIC DOSE: 20 to 60 mg/kg IV (Brophy et al, 2012; Loddenkemper & Goodkin, 2011).
    c) LACOSAMIDE: ADULT DOSE: 200 to 400 mg IV; 200 mg IV over 15 minutes (Brophy et al, 2012). PEDIATRIC DOSE: In one study, median starting doses of 1.3 mg/kg/day and maintenance doses of 4.7 mg/kg/day were used in children 8 years and older (Loddenkemper & Goodkin, 2011).
    d) TOPIRAMATE: ADULT DOSE: 200 to 400 mg nasogastric/orally OR 300 to 1600 mg/day orally divided in 2 to 4 times daily (Brophy et al, 2012).
    H) BOTULISM
    1) ANTITOXIN
    a) Antitoxin is indicated in cases of foodborne botulism (Center for Food Safety and Applied Nutrition (CFSAN), 2009; Gomez et al, 1995), but not recommended in infant botulism due to the risk of sensitization and anaphylaxis. Ventilatory and nutritional support are the primary therapy for infant botulism (Wohl & Tucker, 1992).

Summary

    A) The severity of the toxicity depends on the virulence of the organism, number of organisms ingested, and the host patient co-morbidities and immunity.

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