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17 Cards in this Set
- Front
- Back
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What are spore forming bacteria?
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survive in cooking and cooked food due to death of spore
mostly soil bacteria adaptation to famine esp grain or veg poor competitor naturally in raw food only grow when others are dead |
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What do spore forming bacteria do?
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produce extracellular digestive enzymes that make exotins in animals
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What is the main problem with spore forming bacteria?
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under cooking is main problem.
do not colonize only profilerate in food |
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How do you control spore forming bacteria?
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Proper storage
below 45F or above 140F |
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What is Clostridium
C.perfringens and what does it do? |
gram positive thermophile
obligate anaerobes that is both not pure intoxication and infection. " disease without colonization" vegetative: up to 140 take 6-12hours |
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What are the symptom of C.perfringens?
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make protien act as enterotoxin in humans intest when sporualte
most common cause of G*, makes small enterotoxin in food also in animal intestine so in meat and soil because it can easily digest protein |
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What is C.botunlinum ?
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Mesophile that is more air sensitive than C.p. take 48 hours to work
Endopsore most heat resistnat Neurotoxin: survie dig.enz ABCDEFG toxin, A&B most common E is unqiue: fish more than soil and grow at refrig temp: 39F diease from ingesting |
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What does C.botunlinum thrive in ?
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if+12 horus cook food and canned food
insuff. Heated, non acidic: less than 4.5 in deep cointainer and left: onions smoked fish, not heated well: type E |
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What are the symptons of C.bot.?
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Muslce no contract
paralysis anit toxin can help but if bound to synapses will not reverse |
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How do you control C. bot?
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heat to denature toxin up to 80C for 10min.
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What do adult food borne botulism do?
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Blurring vision, diziness, difficulty speaking, grdual paralysis. Respiratroy paralysis
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What is infant botulism?
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ingest endospore not toxin: infection
endospore no germ in adults, but in babies if eat soil and honey |
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What is wound botulism?
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not food borne. Wound contamin.
endospore in wound if deep, toxin by vegetative cell as well |
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What is B.cereus?
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gram positive, mesophile
best at 80-100F obligate anaerobes takes 8-16H for G* takes 2-6 for Emetic dur: 8-12H dur:4-10H obligate anaerobes |
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What does B. cereus cause?
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in soil and cereal and veg.
digest starch and protein Some make enterotoxin: G* Some make emetictoxin: emetic disease Both cases from toxin already in food spoilage involing sulfide not pathogenic toxin in food |
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How do you control B.cereus?
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need to refriege cooked
reheating might kill entertox but not emetic toxin |
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What is D.nigrificans?
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obligate anaerobes
spoilage involing sulfide not pathogenic toxin in food |
