Transcript RSFS - Lesson 3

What Are Some Important Foodborne
Pathogens?
1
Cause of Foodborne Illness
• Infection—Ingested
pathogen cells grow in the
gastro-intestinal tract
• Toxin—Pathogen produces
a toxin in food that is
consumed
2
Common Symptoms of
Foodborne Illness
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•
Nausea
Vomiting
Diarrhea
Fever
Jaundice (in Hepatitis A)
Abdominal cramps
3
How Many Pathogenic Cells
Does It Take?
• As few as 10, or as many as a million
depending on the specific pathogen and
other factors
4
There are More than 30 Important Foodborne
Pathogens—20 are listed below
Bacteria
Viruses
Parasites
Bacillus cereus
Hepatitis A
Anisakis spp.
Campylobacter jejuni
Norovirus
Cryptosporidium
Clostridium botulinum
Rotavirus
Cyclospora
Clostridium perfringens
Giardia lamblia
Escherichia coli
Toxoplasma gondii
Listeria monocytogenes
Trichinella spiralis
Salmonella spp.
Shigella spp.
Staphylococcus aureus
Fungi—primarily of concern regarding
Vibrio spp.
carcinogenic toxin production
Yersinia enterocolitica
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Fill-in the Pathogen
• Use the “Common
Foodborne
Pathogens” table
to find the
answers
6
Pathogens for Study
• Norovirus
• Campylobacter jejuni
• Salmonella spp.
• E. coli 0157:H7
• Clostridium botulinum
Cause the most
foodborne illnesses
Can have severe
consequences
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Pathogens for Study
Use your group’s assigned “Activity Envelopes”
to study one of these pathogens:
• Norovirus
• Campylobacter jejuni
• Salmonella spp.
• E. coli 0157:H7
• Clostridium botulinum
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Norovirus
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Norovirus
• Common food sources
– Contaminated shellfish, prepared foods
contaminated by infected food handlers
• Control measures
– Good personal hygiene
• What happened to the Florida State
football team?
– They were infected with norovirus by the Duke
University football team
10
Campylobacter jejuni
11
Campylobacter jejuni
• Common food sources
– Raw milk, poultry, beef, pork, shellfish
• Control measures
– Avoid cross-contamination, cook
thoroughly
• What food caused an outbreak of
Campylobacter in the article?
– Raw milk
• Can raw milk be served in food service
establishments?
– No
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Campylobacter jejuni
• In food service, only pasteurized
milk be served.
• Pasteurization is heating of milk
to destroy vegetative pathogenic
bacteria.
13
Salmonella species
14
Salmonella species
• Common food sources
– Poultry, eggs, meat, raw milk, fresh
produce
• Control measures
– Avoid cross-contamination, cook
thoroughly
• What long-term problems continue to
plague Jennifer Thompson as a result
of Salmonella infection from ice
cream?
– Arthritis and gastrointestinal tract
problems
15
Escherichia coli (E. coli) O157:H7
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E. coli O157:H7
• Some food sources
– Raw and undercooked ground beef, lettuce,
unpasteurized apple juice
• Control measures
– Avoid cross-contamination, cook thoroughly
(ground beef to 155°F for 15 seconds)
• How did 16-year old Angela contract
E. coli?
– Caesar salad served at summer drill-team camp
• How long was she in the hospital?
– 27 days
17
Clostridium botulinum
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Clostridium botulinum
• Food sources
– Improperly home-canned, low-acid food
– Improperly stored low-acid foods
• Control measures
– Proper canning; home-canned food may not be used in
foodservice
– Adequate cooling of low-acid foods
• What was the source of botulism contracted by
church supper attendees?
– Frozen chili that had been held at warm temperatures
during storage by a food salvage store
19
Pathogens that are Cause for
Exclusion from Work
The Idaho Food Code requires food employees
must be excluded from a food service
establishment if they are infected with:
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Salmonella typhi
Shigella
E. coli—shiga toxin type
Hepatitis A virus
Norovirus
20
Understanding Check!
• For controlling the spread of norovirus
infection, what behavior is most important?
21
Understanding Check!
• What are the most important control factors
(2) for avoiding illness from Salmonella,
Campylobacter, and E. coli 0157:H7?
22
Understanding Check!
• If a food worker is infected with one of
these five pathogens, he/she must not
work in a food establishment. Name
them.
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A Case of Norwalk
Oh when the weather got cool
I thought I'd treat myself to a
cruise
But then the Norwalk Virus
showed up and had me
singing the blues
A case of Norwalk
Out on the sea
In the bathroom of my
cabin
Is where I'll be
A CASE OF NORWALK
On my vacation cruise
A CASE OF NORWALK
Many lunches I'd lose
A CASE OF NORWALK
People sick everywhere
A CASE OF NORWALK
Cruisers better beware OF
THE NORWALK VIRUS
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A Case of Norwalk
Don't know if it came from
the passengers or from the
food
But I'll tell you this, it can
really affect your mood
A case of Norwalk
Out on the sea
In the bathroom of
my cabin
Is where I'll be
A CASE OF NORWALK
On my vacation cruise
A CASE OF NORWALK
Now I'm singing the blues
A CASE OF NORWALK
Lots of people like me
A CASE OF NORWALK
Better call CDC
ABOUT THE NORWALK VIRUS
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A Case of Norwalk
A case of Norwalk
Out on the sea
In the bathroom of my cabin
Is where I'll be
A CASE OF NORWALK
On my vacation cruise
A CASE OF NORWALK
Many lunches I'd lose
A CASE OF NORWALK
People sick everywhere
A CASE OF NORWALK
Cruisers better beware
OF THE NORWALK VIRUS
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