Abstract
Anaerobic bacteria are frequent inhabitants of the urethra of both normal men and men with non-gonococcal urethritis. All microbiologically-based studies have shown them not to have a role in the aetiology of the condition. However, Bacteroides ureolyticus continues to be an enigma having been isolated more commonly from men with urethritis in some studies, not confirmed by others, as well as in treatment-based studies in which the organism has been implicated by some authors. Few studies related to anaerobic organisms in the male genital tract have been conducted during the last decade.