ObjectiveThis study aimed to investigate the prevalence of sexually transmitted infections (STIs) and colonizing bacteria in relation to urogenital symptoms.Materials and MethodsIn this cross-sectional study, patients visiting the STI clinic at Umeå University Hospital were asked for symptoms and condom use. Samples from 759 patients (465 male and 294 female) were analyzed for 4 STIs (Chlamydia trachomatis, Neisseria gonorrhoeae, Trichomonas vaginalis, and Mycoplasma genitalium) and 3 colonizing bacteria (Mycoplasma hominis, Ureaplasma parvum, and Ureaplasma urealyticum).ResultsChlamydia trachomatis prevalence was 11% among women and 9.5% among men. Neisseria gonorrhoeae prevalence was 0.7% among women and 0.9% among men. Mycoplasma genitalium was found in 11% and 5.6% of women and men, respectively. Asymptomatic men and women had similar distribution patterns of microorganisms as those with urogenital symptoms, with the exceptions of Neisseria gonorrhoeae– and Mycoplasma genitalium–infected men who declared symptoms more frequently. Of 158 men with urogenital symptoms, 55% were test-negative. Of 129 women with urogenital symptoms, 12% were test-negative.ConclusionsThis study reveals a complex picture, where a large number of multi-positive tests made it complicated to correlate urogenital symptoms with microorganisms. A high number of test-negative but symptomatic patients indicate a need of searching for additional pathogens.

The aim of this study was to investigate whether Swedish swingers constitute a risk group for sexually transmitted infections (STIs). Two swinger clubs were invited to participate. At swinger meetings, members were offered an STI sampling kit and a questionnaire. Samples were analyzed for Chlamydia trachomatis, Neisseria gonorrhoeae, Mycoplasma genitalium, and Trichomonas vaginalis using a multiplex real-time polymerase chain reaction assay. In total, 235 swingers participated (118 women and 117 men). Urogenital C. trachomatis prevalence was 1.7%. Urogenital M. genitalium prevalence was 7.6% for women and 4.3% for men. No one tested positive for N. gonorrhoeae or T. vaginalis. For women, the mean number of unprotected temporary sex partners within the last 12 months was four men (range 0–35) and three women (range 0–50). Among men, the mean number of unprotected temporary sex partners within the last 12 months was five women (range 0–50) and 0 men (range 0–10). During vaginal sex, 46.6% women and 38.5% men always used protection with a temporary sex partner. Swedish swingers did not seem to have an increased prevalence of STIs. However, there was high-risk sexual behavior with unprotected sex and multiple sex partners, thereby making them a vulnerable group for acquiring STIs.