title: Sexual transmission of hepatitis A in homosexual men: incidence and mechanism.
abstract: We performed monthly examinations and serologic tests for antibody to hepatitis virus A (anti-HA) in a study of 57 heterosexual men and 102 homosexual men followed prospectively for a mean of 8.9 months and 6.1 months, respectively. The initial prevalence of anti-HA was 30 per cent in homosexual men and 12 per cent in heterosexual men P less than 0.01). The annual incidence of hepatitis A in susceptible (seronegative) homosexual men was 22 per cent, whereas no heterosexual men acquired hepatitis A. Diaries concerning sexual behavior kept by homosexual men showed that the acquisition of hepatitis A virus infection contact. Hepatitis A should be considered one of the enteric infections that appear to be sexually transmitted among homosexual men.
mesh_terms: D000293:Adolescent; D000328:Adult; D000914:Antibodies, Viral / Q000032:analysis; D006506:Hepatitis A / Q000453:epidemiology / Q000635:transmission*; D006507:Hepatovirus / Q000276:immunology; D006716:Homosexuality; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D012189:Retrospective Studies; D012725:Sexual Behavior; D012749:Sexually Transmitted Diseases / Q000453:epidemiology; D014861:Washington
chemical_list: D000914:Antibodies, Viral