Infectious diarrhea in human immunodeficiency virus infection.

Gastrointestinal symptoms, particularly diarrhea, are common in patients with AIDS. Recent evidence indicates that enteric pathogens can be identified in most of these cases. Appreciating the clinical features caused by protozoal, fungal, bacterial, and viral pathogens will assist the clinician in effectively evaluating the gastrointestinal symptoms. Antimicrobial agents now are available for many of these pathogens.