Twenty-three Ugandan patients with enteropathic acquired immunodeficiency syndrome (AIDS, 'slim' disease) were studied. Upper gastrointestinal (GI) endoscopy, colonoscopy, biopsy, stool parasitology and culture were performed. Endoscopy revealed oral and/or oesophageal candidiasis in 22 patients. Stool examination and histology of the upper GI tract showed that 11 patients had cryptosporidiosis and three had isosporiasis (total of 61% of patients with coccidian enteritis). One case of possible Mycobacterium avium mycobacteriosis was also identified. Enteropathic AIDS in Uganda presents with a spectrum of infections similar to that found in developed countries, but the incidence of cryptosporidiosis and isosporiasis is higher.