SUMMARY:The objective of this study was to determine the prevalence of urethral Mycoplasma genitalium infections among male patients attending a sexually transmitted disease (STD) clinic in China and identify risk factors associated with this disease. A total of 423 patients were recruited in Hezhou City, Guangxi Province, China, and each was requested to complete a questionnaire regarding sociological and sexual behaviors. First-void urine samples were collected for M. genitalium analysis by polymerase chain reaction. Of the 406 urine samples collected, 114 were M. genitalium-positive, giving a prevalence rate of 28.1z. Univariate logistic regression analysis showed that M. genitalium infection was associated with younger age, having received at least senior high school education, and single marital status. In both univariate and multivariate logistic regression analyses, M. genitalium infection was found to be associated with lack of symptoms for STD in the past year (adjusted odds ratio [AOR] = 2.839; 95z CI = 1.495-5.392; P = 0.001), no use of condoms with steady partners in the past year (AOR = 2.830; 95z CI = 1.468-5.455; P = 0.002), and having sexual encounters with female sexual workers within the past 3 months (AOR = 2.955; 95z CI = 1.637-5.336; P º 0.0003). The observed high rate of M. genitalium infection among male STD patients in Hezhou City indicates an M. genitalium epidemic in the study population; thus, the national surveillance program and clinical health providers in China should more closely monitor this disease.
INTROUDCTIONMycoplasma genitalium was first isolated from 2 of 13 men with non-gonococcal urethritis (NGU) in 1981 (1). By molecular assays, many studies have associated M. genitalium infection with acute NGU, particularly non-chlamydial NGU (NCNGU) in men (2-5), with a prevalence ranging from 5z to 42z (6). M. genitalium also plays an etiological role in both persistent and recurrent NGU with an estimated prevalence of 19z-41z in men with persistent or recurrent urethritis (4,6). Although M. genitalium is an emerging pathogen of NGU, a limited number of studies have observed an M. genitalium prevalence of 10z-24z among men with NGU in China (7-9). Moreover, the National Sentinel Surveillance Program of China reported that the prevalence of NGU since 2008 has been equivalent to that of genital Chlamydia trachomatis infection (10), without including the rate of M. genitalium-positive NGU. Thus, the actual rate of NGU in China may have been grossly underestimated. Furthermore, most healthcare providers often neglect M. genitalium-positive NGU; therefore, very little information is available regarding the disease burden of this pathogen. A study conducted by our group recently reported the prevalence of C. trachomatis and Neisseria gonorrhoeae infections among male patients attending a sexually transmitted disease (STD) clinic (MSP) in China (11); however, this study did not include M. genitalium infection. Therefore, as a supplementary study, our objective of the present study was to d...