Fig. 19.4 Acute viral gastroenteritis in a middle-aged adult. Barium enema reveals generalized edema and irritability of the entire colon with accentuation of the haustral markings.


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Differential Diagnosis

In addition to differentiating shigellosis from many of the infectious diseases involving the colon and ileum discussed in this book, the various causes of traveler's diarrhea listed below must be excluded, depending on the patient's presenting symptoms, circumstances, laboratory and radiological findings (Fig. 19.4).

Etiology of Traveler's Diarrhea:

(A) Viral

1. Rotovirus
2. Norwalk-like viruses

(B) Bacterial

1. Enterotoxigenic E. coli (ETEC)- responsible for most cases
2. Salmonella species
3. Shigella species
4. Campylobacter jejuni
5. Vibrio parahaemolyticus





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