Sexual transmission of intestinal parasites.
D004029:Dientamoeba; D004748:Entamoeba histolytica; D005872:Giardia; D006716:Homosexuality; D006801:Humans; D007411:Intestinal Diseases, Parasitic / Q000453:epidemiology*; D008297:Male; D012749:Sexually Transmitted Diseases / Q000453:epidemiology*