Anaerobes in genitourinary infections in men.

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Abstract
Urethral and sub-preputial swabs from 150 men were examined. There was a strong association between the isolation of anaerobic bacteria, particularly Bacteroides spp., and a clinical diagnosis of balanoposthitis, nonspecific urethritis (NSU), or both. Aerobic bacteria formed the predominant flora in 28 healthy controls; anaerobes were predominant in specimens from 79 patients with balanoposthitis, from 24 with NSU and from 19 with both. Bacteroides spp. were the commonest isolates in all patient groups: B. asaccharolyticus, B. melaninogenicus ssp. intermedius, B. ureolyticus and B. bivius were the most common species. The results obtained with 2 swabs were identical except that Gardnerella vaginalis was isolated from the urethral swab only in 5 patients.