Effect of HIV transmission category and CD4 count on the occurrence of diarrhea in HIV-infected patients.

This study was designed to assess the relative contributions of HIV transmission category and immunodeficiency to the risk of HIV-related diarrhea. We reviewed the medical records of 169 HIV-infected non-AIDS patients seen between 1986 and 1990 at the Houston VA Special Medicine Clinic. The prevalence of diarrhea at any given clinic visit ranged from 3% to 7%. Diarrhea was three times more common in homosexual/bisexual men [odds ratio = 3.0 (1.01-9.53)], and this pattern persisted when stratified by CD4 count. Previous studies have focused mainly on the detection of enteric organisms in patients with HIV-related diarrhea. Studies of the temporal relationships between sexual practices, enteric pathogens, diarrhea, and immunodeficiency are needed to clarify the pathogenesis of HIV-related diarrhea.