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Infection & Immunology > Food Poisoning > Flashcards

Food Poisoning Flashcards

1
Q

Which organism causes muscle paralysis?

A

C.botulinum

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2
Q

Which organism causes meningitis?

A

L.monocytogenes

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3
Q

Which organism is involved in oviduct contamimation?

A

Salmonella

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4
Q

Which organism is involved in filter feeder fish contamination?

A

Vibrios (oyster)

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5
Q

Which organism is from unwashed hands of infected people?

A

Shigella

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6
Q

Which organisms multiply at refrigeration temperature?

A

L.monocytogenes and Y.entercolitica

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7
Q

S.aureus food items

A

Starchy or salty food, Dairy products- cream pie, custard

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8
Q

What is special about S.aureus?

A

Multiplies in food at room temp. liberating HEAT-STABLE ENTEROTOXIN (resists inactivation by eating)

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9
Q

S.aureus symptoms

A

Abdominal pain and vomiting, RARELY DIARRHEA

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10
Q

Bacillus cereus characteristics (3)

A

Gram-positive

Aerobic

Spore-forming

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11
Q

What is vehicle of infection of Bacillus aureus?

A

Fried rice

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12
Q

What is special about B.cereus?

A

HEAT-STABLE TOXIN —> survives quick frying —> spores also survive —> preformed toxin —> VOMITING (EMETIC type of food poisoning w/ short incubation)

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13
Q

What happens if a large number of B.cereus spores are consumed?

A

GERMINATION occurs in intestine —> Vegetative cells produce ENTEROTOXIN —> WATERY DIARRHEA (Diarrheic type of food poising w/ long incubation)

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14
Q

Where is Clostruidum perfringes found?

A

Environment and Animal/Human intestine

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15
Q

What are the different strains of C.perfringes?

A

Type A —> Common food poisoning (Nausea and Diarrhea)

Type C —> SEVERE type (ENTERITIS NECROTICANS or PIG BEL)

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16
Q

How is the Diarrhea caused C.perfringes?

A

ENTEROTOXIN —> during sporulation of organism in intestine

17
Q

What are the common foods for C.perfringes?

A

Meat, Meat products, Meat gravy

18
Q

Where is Clostridium botulinum present?

A

Soil, Agricultural products, Intestinal tracts of animal and fish

19
Q

What are the foods implicated for C.botulinum?

A

Inappropriately home-canned food items (vegetables, meat, fish)

20
Q

What is special about C.botolinium?

A

Organism multiples during ANAEROBIC environment —> HEAT-LABILE NEUROTOXIN released during germination of spore—> Neurotoxin prevents signal transmission by blocking release of Acetylcholine from synaptic vesicles —> FLACCID PARALYSIS

21
Q

What are the symptoms of C.botulinum infection?

A

Fatigue, Vertigo (rotation/spinning sensation), Difficulty in swallowing and breathing, Constipation

Infection & Immunology (13 decks)

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