Homosexuals and enteric infections in a London health district.
D000293:Adolescent; D000328:Adult; D001424:Bacterial Infections / Q000453:epidemiology*; D006716:Homosexuality; D006801:Humans; D007410:Intestinal Diseases / Q000453:epidemiology*; D007411:Intestinal Diseases, Parasitic / Q000453:epidemiology*; D008131:London; D008297:Male; D011528:Protozoan Infections / Q000453:epidemiology*