PT - JOURNAL ARTICLE AU - L Falk AU - H Fredlund AU - J S Jensen TI - Symptomatic urethritis is more prevalent in men infected with <em>Mycoplasma genitalium</em> than with <em>Chlamydia trachomatis</em> AID - 10.1136/sti.2003.006817 DP - 2004 Aug 01 TA - Sexually Transmitted Infections PG - 289--293 VI - 80 IP - 4 4099 - http://sti.bmj.com/content/80/4/289.short 4100 - http://sti.bmj.com/content/80/4/289.full SO - Sex Transm Infect2004 Aug 01; 80 AB - Objectives: To study the prevalence, symptoms, and signs of Mycoplasma genitalium and Chlamydia trachomatis infections in men attending a Swedish STD clinic and to study the criteria for urethritis. Methods: A cross sectional study among STD clinic attendees in Örebro, Sweden. Attendees were examined for microscopic urethritis and first void urine (FVU) was tested for M genitalium and C trachomatis. Results: The prevalence of M genitalium and C trachomatis was 7% (34/512) and 12% (61/512), respectively. Dual infection was diagnosed in four men. In both infections 90% of the patients had signs of microscopic urethritis. M genitalium positive men had symptomatic urethritis significantly more often than those infected with C trachomatis (73% v 40%, RR 1.8; 95% CI 1.2 to 2.7). 63% of female partners of men infected with M genitalium were infected with M genitalium compared with chlamydial infection in 67% of female partners of men infected with C trachomatis. Non-chlamydial non-gonococcal urethritis without evidence of M genitalium infection was diagnosed in 180 men (35%). Symptoms and/or visible discharge were reported in 49% in this group. Conclusions:M genitalium is a common infection associated with symptomatic urethritis and with a high prevalence of infected sexual partners supporting its role as a sexually transmitted infection.