[HIV infection and isosporiasis. Presentation of a case].

A HIV seropositive patient with chronic diarrheic syndrome, in which oocysts of Isospora belli were detected in feces by the modified technique of Ziehl-Neelsen was studied. Other coproparasitological techniques were applied and cultures were applied made with negative results. Any other infectious origin was excluded from the picture. The patient was treated with 2 tablets of Co-trimoxazole (trimethoprin 80 mg, sulphamethoxazole 400 mg) every 6 hours for ten days, with referral of the symptoms.