characterization of risk factors for helicobacter pylori infection among men attending a sexually transmitted disease clinic: lack of evidence for sexual transmission. | the mechanism of transmission of helicobacter pylori is unknown. to investigate the role of sexual behavior and demographic factors in the acquisition of h. pylori infection, we evaluated the seroprevalence of antibody to h. pylori in 370 men attending an urban sexually transmitted diseases clinic. sera from the following three groups were analyzed by enzyme-linked immunosorbent assay for h. pylori-specific immunoglobulin g: 78 human immunodeficiency virus (hiv)-seropositive homosexual men, 102 ... | 1991 | 1939565 |