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11 Cards in this Set

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Mechanism:Non-inflammatory
(enterotoxin)
Location:proximal small bowel
Stool exam:no fecalleukocytes
Example organisms:
E. coli
Salmonella
Campylobacter jejuni
Giardia
Cryptosporidium parvum
Rotavirus
Norwalk-like agents
Illness: Diarrhea
Mechanism:Inflammatory (invasive, cytotoxin)
Location: colon
Stool exam: fecal PMNs
Example organisms:
Shigella
Invasive E. coli
S. enteritidis
C. difficile
E. histolytica
B. coli
Illness: Dysentary
Mechanism:Penetrating
(invasive, spread
Location:distal small bowel
Stool exam: monos & leukocytes
Example organisms:
S. typhi
Y. enterocolitica
Illness:Enteric fever
Escherichia
Salmonella
Shigella
Yersinia
Klebsiella
Serratia
Proteus

are. . .
Enterobacteriaceae
Enterobacteriaceae are
Gram negative, facultative anaerobic rods
Gram ___ are purple/blue;
+
Gram ___ are pink
-
Lab identification of the enterics
1) isolate G- bacteria

2) TSI – triple sugar iron assay
E. coli is lactose __
+
E. coli is grouped based on _______
surface antigens
E. coli serotype differentiation
1. immunologic assay
2. growth on MacConkey agar with sorbitol