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KATIE Food intoxication L41 & 42 (Meats, stews, gravies (Diarrheal -…
KATIE Food intoxication
L41 & 42
Human
Staphylococcus aureus
Virulence:
Enterotoxin A --> absorbed in gut
--> stimulates CNS --> impulse to vomiting center
Clinical:
ACUTE EMETIC + DIARRHEAL DISEASE
Sudden onset of n/v/d, cramps, salivation
Can lead to: enterocolitis
Improperly cooked/ refrigerated rice
Emetic - Bacillus cerus
Virulence:
heat STABLE enterotoxin
INCREASE CGMP
Clinical (preformed toxin)
FAST ONSET: upper GI symptoms
Vomiting
Cramps
Diarrhea
Meats, stews, gravies
Diarrheal - Bacillus cereus
Virulence:
heat LABILE enterotoxin
INCREASE CAMP
Clinical (vegetative cells --> in situ toxin)
SLOWER ONSET (1-17 hrs)
Abdominal pain
Profuse water diarrhea
Spore formers
Clostridium
Clostridium dificile
Virulence
Toxin A: enterotoxin
Toxin B: cytotoxin
Clinical
Diarrea + lower abdominal cramping
Severe colitis WITHOUT pseudomembrane
Profuse diarrhea + pain
Systemic effects: n/v, malaise
Pseudomembranous colitis:
YELLOW plaques 2-10 mm diameter over mucosa
Pseudomembrane = fibrin clot of PMN, monocytes, RBC
Clostridium perfringens
Type A
Clinical
RAPID ONSET of severe, watery
diarrea + abdominal craming
NO VOMITING OR FEVER
Virulence
SPORULATION --> Enterotoxin
Inhibits glucose + Cl intake on intestinal mucosa
Denudes BRUSH BORDERS
HYPERSECRETION of electrolytes + water into lumen
Type C
Clinical
:
MORE SEVERE S+S than type A
Bloody diarrhea
Severe abdominal pain
Virulence:
Heat resistant spores
Beta toxin
Food, milk,
meat: PORK
Peaks in winter
Yersinia enterocolitica
Virulence:
Invasin --> endocytosis into M cells
of Peyer's patches in TERMINAL ileum
Clinical:
Fever
Abdominal pain
Diarrhea
Vomiting
Transfusion related SEPSIS
: