The most important causes of traveler’s diarrhea occurring in developing regions, in decreasing order, are ETEC, enteroaggregative E coli, diffusely adherent
Ecoli,noroviruses,rotavirus,Salmonellaspecies,Campylobacterjejuni, Shigella species, Aeromonas species, Plesiomonas shigelloides, enterotoxigenic Bacteroides fragilis, and Vibrio species; the parasites Giardia duodenalis Cryptosporidium species, Entamoeba histolytica, and Microsporidium species s