To elucidate the significance of
Trichomonas vaginalis as an etiological factor in infection of the male genitourinary tract, we studied by routine microscopic examination the detection rate of
T. vaginalis in 43, 050 urine specimens from patients attending three hospitals. These comprised 22, 199 male's and 20, 851 female's specimens, for a period from January 1985 to June 1985. In addition, the incidence of
T. vaginalis in 61 gonococcal urethritis patients (average age 28.6 years), 113 nongonococcal urethritis patients (average age 31.7 years), 55 chronic prostatitis patients (average age 42.7 years) and 19 male sex partners of women with vaginal trichomoniasis (average age 39.6 years) was investigated by microscopic examination and culture for the period from July 1985 to December 1985. The results obtained are as follows:
1. Sixty-nine urine specimens of 54 male patients and 85 specimens of 66 female patients contained
T. vaginalis. The mean age of
Trichomonas-positive was 65.7 years (range, 39 to 84 years) in the male patients, but 50.8 years (range, 19 to 80 years) in the female patients; there was a significant difference (p<0.01). Of the 54 male patients with
T. vaginalis, 17 (31.5%) had underlying diseases of the urinary tract, 7 (13.0%) had diabetes mellitus and 4 (7.4%) had malignant tumors.
2.
T. vaginalis was isolated in the urethral smear of only one patient (1.6%) with gonococcal urethritis and two patients (1.8%) with nongonococcal urethritis.
Chlamydia trachomatis was detected simultaneously in the latter two patients, using fluorescein-labeled monoclonal antibodies (Direct Specimen Test
TM)
3. The samples of expressed prostatic fluid of 8 patients (14.5%) with chronic prostatitis contained
T. vaginalis. The
Trichomonas-positive patients ranged in age from 44 to 77 years (average age 60.3 years), and six of them had underlying disorders of the urinary tract.
4.
T. vaginalis was isolated in the urethral smear and prostatic fluid of only one (5.3%) of the men who had sex partners with trichomoniasis. However, this man had no symptoms or signs of the infection.
These results suggest that
T. vaginalis might be an opportunistic pathogen in males and that males might be important transmitters of female trichomoniasis.
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