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23 Cards in this Set
- Front
- Back
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Clostridium perfringens - gram, shape, air?
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Gram positive, rod, anaerobe.
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Clostridium perfringens - spores?
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Yes.
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Clostridium perfringens - resistant to heat?
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Sort of - 5-10 minute boiling usually kills.
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Clostridium perfringens - found?
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Meat juices, soil, gut.
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Clostridium perfringens - can cause?
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Gas gangrene.
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Clostridium perfringens - grows at?
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20-50C, not below 15 or above 60.
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Clostridium perfringens - doubling time?
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Fast - 18 minutes at 45C.
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Clostridium perfringens - characteristic ID?
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Stormy fermentation of milk - coagulates and produces gas - can explode tubes!
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Clostridium perfringens - how much in stool for infective state?
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10^7/g
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Clostridium perfringens - salt tolerant?
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No.
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Clostridium perfringens - pH?
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6.0-7.5 best.
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Clostridium perfringens - onset time?
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Varies, usually 8-15 hours.
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Clostridium perfringens - symptoms?
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Mild nausea and cramps - rarely vomiting and diarrhea.
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Clostridium perfringens - duration?
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Short - about 20 hours.
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Clostridium perfringens - action?
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Several entero-acting toxins. A-F strains; A most common.
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Clostridium perfringens - treatment?
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Supportive; seldom fatal.
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Clostridium perfringens - environment air?
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Not need to be anaerobic if reducing conditions of surface preclude oxidation; not as oxygen sensitive as C. botulinum.
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Clostridium perfringens - indirect sources?
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Cutting boards, slicers, knife racks, cross contamination, vermin, fececs, airborne.
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Clostridium perfringens - detection?
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Anaerobic enrichment, thioglycollate media, cycloserine.
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Clostridium perfringens - Egg Yolk results?
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Lipase positive, Lecithinase negative.
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Clostridium perfringens - prevention?
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Keep foods at or above 60C, avoid cross contamination, cover foods in refrigeration, hygeine, flies, cooking kills toxin.
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Clostridium perfringens - frequency?
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Probably more prevelant than reported; just because you find it does not mean conditions are unsanitary - high numbers in environment.
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Clostridium perfringens - infection or intoxication?
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Infection, but somewhat of an intoxication.
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