We conducted a prospective study in internal medicine and infectious diseases wards of the hospital of Point " G " in Bamako, Mali from January to December 2002. Overall 112 patients HIV positive, thirty-five patients (31,25%) had at least a digestive parasitic disease. We found that the most frequent parasite in stools sample were protozoa (82,85%). The second most frequent parasites were helminthes (20,33%). HIV/AIDS opportunistic parasites represented 40% of all parasites found. These included 25,71% cases of Cryptosporidium sp, 8,57% cases of Isospora belli and 5,71 % for microsporidia. The functional signs of our patients were mostly asthenia and weight loss. The physical signs were conjunctive pallor (71, 42%) and diarrhea (85, 71%). Generalized itching was present in 54, 28% of cases and abdominal pains in 25, 71% of cases. The global lethality was 37, 14% (13/35). The deaths were due to the HIV infection. The parasites appear even frequent at patients infected by HIV/AIDS, in spite of the advent of antiretroviral therapy. The efficient molecule research against the opportunist parasite must constitute one of our priorities in tropical area.