Food Poisoning Flashcards
Which organism causes muscle paralysis?
C.botulinum
Which organism causes meningitis?
L.monocytogenes
Which organism is involved in oviduct contamimation?
Salmonella
Which organism is involved in filter feeder fish contamination?
Vibrios (oyster)
Which organism is from unwashed hands of infected people?
Shigella
Which organisms multiply at refrigeration temperature?
L.monocytogenes and Y.entercolitica
S.aureus food items
Starchy or salty food, Dairy products- cream pie, custard
What is special about S.aureus?
Multiplies in food at room temp. liberating HEAT-STABLE ENTEROTOXIN (resists inactivation by eating)
S.aureus symptoms
Abdominal pain and vomiting, RARELY DIARRHEA
Bacillus cereus characteristics (3)
Gram-positive
Aerobic
Spore-forming
What is vehicle of infection of Bacillus aureus?
Fried rice
What is special about B.cereus?
HEAT-STABLE TOXIN —> survives quick frying —> spores also survive —> preformed toxin —> VOMITING (EMETIC type of food poisoning w/ short incubation)
What happens if a large number of B.cereus spores are consumed?
GERMINATION occurs in intestine —> Vegetative cells produce ENTEROTOXIN —> WATERY DIARRHEA (Diarrheic type of food poising w/ long incubation)
Where is Clostruidum perfringes found?
Environment and Animal/Human intestine
What are the different strains of C.perfringes?
Type A —> Common food poisoning (Nausea and Diarrhea)
Type C —> SEVERE type (ENTERITIS NECROTICANS or PIG BEL)
How is the Diarrhea caused C.perfringes?
ENTEROTOXIN —> during sporulation of organism in intestine
What are the common foods for C.perfringes?
Meat, Meat products, Meat gravy
Where is Clostridium botulinum present?
Soil, Agricultural products, Intestinal tracts of animal and fish
What are the foods implicated for C.botulinum?
Inappropriately home-canned food items (vegetables, meat, fish)
What is special about C.botolinium?
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
What are the symptoms of C.botulinum infection?
Fatigue, Vertigo (rotation/spinning sensation), Difficulty in swallowing and breathing, Constipation
