| Clinical syndrome | Common pathogens | Comments |
| Acute watery diarrhea | Enterotoxigenic Escherichia coli (ETEC) | Most common cause of acute watery diarrhea |
| Vibrio cholerae O1 or O139 | ||
| Norovirus | Vomiting may be a prominent feature | |
| Campylobacter species | ||
| Nontyphoidal Salmonella enterica | ||
| Aeromonas species | ||
| Enteroaggregative Escherichia coli (EAEC) | ||
| Enterotoxigenic Bacteroides fragilis | ||
| Acute bloody diarrhea | Shigella species | Most common cause of acute bloody diarrhea |
| Campylobacter species | ||
| Enteroinvasive Escherichia coli (EIEC) | ||
| Enterohemorrhagic Escherichia coli (EHEC) | ||
| Nontyphoidal Salmonella enterica | Rare | |
| Entamoeba histolytica | ||
| Schistosoma mansoni |
