Organisms That Can Bug You
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Disease & Organism That Causes It |
Source of Illness |
Symptoms |
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BACTERIA |
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Botulism
Botulinum toxin (produced by Clostridium
botulinum bacteria) |
Spores of these
bacteria are widespread. But these bacteria produce toxin only in an
anaerobic (oxygen-less) environment of little acidity. Found in a
considerable variety of improperly canned or home-canned foods, such as
corn, green beans, soups, beets, asparagus, mushrooms, tuna, and liver paté.
Also in luncheon meats, ham, sausage, garlic in oil, and smoked and salted
fish. |
Onset:
Generally 4-36 hours after eating. Neurotoxic symptoms, including double
vision, inability to swallow, speech difficulty, and progressive paralysis
of the respiratory system. Get medical help
immediately. Botulism can be fatal. |
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Campylobacteriosis
Campylobacter jejuni
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Bacteria on
poultry, cattle, and sheep can contaminate meat and milk of these animals.
Chief food sources: raw poultry, meat, and unpasteurized milk. |
Onset:
Generally 2-5 days after eating. Diarrhea, abdominal cramping, fever, and
sometimes bloody stools. Lasts 7-10 days. |
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E. coli infection
Escherichia coli
O157:H7 |
Bacteria in meat,
especially raw or undercooked ground beef, raw milk, contaminated water,
unpasteurized ciders and juices, and on produce. |
Onset:
A few days after eating. Bloody diarrhea, severe abdominal cramps,
dehydration, colitis, neurological symptoms, stroke, and hemolytic uremic
syndrome (HUS), which can cause permanent kidney damage or failure and
death. Lasts 4-15 days. |
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Listeriosis
Listeria monocytogenes |
Found in soft
cheese, unpasteurized milk, raw or undercooked meat, hot dogs, poultry and
fish; and ready-to-eat foods like luncheon meats, cold cuts, fermented and
dry sausage, and other deli-style meat and poultry. The Listeria
bacteria resist heat, salt, nitrite, and acidity better than many other
microorganisms. They survive and grow at low temperatures. |
Onset:
From 7-30 days after eating, but most symptoms have been reported 48-72
hours after consumption of contaminated food. Fever, headache, nausea, and
vomiting. Primarily affects pregnant women and their fetuses, newborns, the
elderly, people with cancer, and those with impaired immune systems. Can
cause fetal and infant death. |
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Perfringens foodborne illness
Closidium perfringens |
In most
instances, caused by failure to keep food hot. A few organisms are often
present after cooking and multiply to toxic levels during slow cool-down and
storage of prepared foods. Meats and meat products are most frequently
implicated. These organisms grow better than other bacteria between 49 and
54 degrees Celsius (120-130 Fahrenheit). So gravies and stuffing must be
kept above 60 C (140 F) and cooled rapidly when being refrigerated.
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Onset:
Generally 8-12 hours after eating. Abdominal pain and diarrhea, and
sometimes nausea and vomiting. Symptoms last a day or less and are usually
mild. Can be more serious in older or debilitated people.
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Salmonellosis
Salmonella
bacteria |
Raw meats,
poultry, eggs, milk and other dairy products, shrimp, frog legs, fresh
produce, sprouts, unpasteurized orange juice, coconut, chocolate, and foods
containing raw eggs. |
Onset:
Generally 6-48 hours after eating. Nausea, abdominal cramps, diarrhea,
fever, and headache. All age groups are susceptible, but symptoms are most
severe for the elderly, the infirm, and infants. |
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Shigellosis (bacillary dysentery)
Shigella
bacteria |
Food becomes
contaminated when a human carrier does not wash hands after using the toilet
and then handles liquid or moist food that is not cooked thoroughly
afterwards. |
Onset:
l-7 days after eating. Abdominal cramps, diarrhea, fever, sometimes
vomiting, and blood, pus or mucus in stools. |
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Staphylococcal foodborne illness
Staphylococcal enterotoxin (produced by
Staphylococcus aureus bacteria) |
Toxin produced
when food contaminated with the bacteria is left too long unrefrigerated.
Meats, ham, poultry, egg products, tuna, potato and macaroni salads, and
cream-filled pastries are good environments for these bacteria to produce
toxin. |
Onset:
Generally 30 minutes to 8 hours after eating. Diarrhea, vomiting, nausea,
abdominal pain, cramps, and prostration. Lasts 24-48 hours. Rarely fatal.
|
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Vibrio infection
Vibrio vulnificus
Vibrio parahaemolyticus |
The
bacteria live in coastal waters and can infect humans either through open
wounds or through consumption of raw contaminated seafood (oysters, clams).
The bacteria are most numerous in warm weather. |
Onset: Abrupt. Chills, fever,
and/or prostration. At high risk are people with liver disease, low gastric
(stomach) acid, and weakened immune systems. |
| The bacteria live
in coastal waters and can infect humans through consumption of raw
contaminated seafood (oysters, clams). The bacteria are most numerous in
warm weather. |
Onset:
4 hours to 4 days after eating. Diarrhea, abdominal cramps, nausea,
vomiting, headache, fever, and chills. Lasts about 2 l/2 days.
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PROTOZOA |
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Cyclosporiasis
Cyclospora cayetanensis |
Source is
unknown, but it's suspected that parasites in the water that is used to
apply pesticides to crops contaminate foods such as berries, other fruit,
raw vegetables, and basil. |
Onset:
About 2 days. Nausea, vomiting, loss of appetite, and diarrhea. Lasts 1 week
to 2 months. |
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Cryptosporidiosis
Cryptosporidium parvum |
Generally
associated with parasites in sewage, contaminated water that gets on food,
and not washing hands after using the toilet. |
Onset:
1-12 days. Profuse watery diarrhea, abdominal pain, appetite loss, vomiting,
and low-grade fever. |
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Giardiasis
Giardia lamblia |
Most frequently
associated with consumption of contaminated water, including that in
swimming pools. May be transmitted by uncooked foods that become
contaminated while growing or after cooking by infected food workers. Cool,
moist conditions favor organism's survival. |
Onset:
l-3 days. Sudden onset of explosive watery stools, abdominal cramps,
anorexia, nausea, and vomiting. Especially infects hikers, children,
travelers, and institutionalized patients. |
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VIRUSES |
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Hepatitis
Hepatitis A virus |
Mollusks
(oysters, clams, mussels, and cockles) become contaminated when their beds
are polluted by untreated sewage. Raw shellfish are especially susceptible,
although cooking does not always kill the virus. |
Onset:
Begins with malaise, appetite loss, nausea, vomiting, and fever. After 3-10
days patient develops jaundice with darkened urine. Severe cases can cause
liver damage and death. |
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Norovirus gastroenteritis
Noroviruses (also known as Norwalk-like
viruses; Norwalk, Hawaii, Snow Mountain, Taunton viruses; caliciviruses) |
Sources of
contamination include human feces, raw shellfish from polluted waters, and
ready-to-eat foods (salads, sandwiches) prepared by an infected person. |
Onset:
1-2 days. Nausea, vomiting, diarrhea, abdominal pain, headache, and
low-grade fever. Lasts about 36 hours. |
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