PT - JOURNAL ARTICLE AU - Tanja H Geelen AU - Christian J P A Hoebe AU - Anne Dirks AU - Nicole H T M Dukers-Muijrers AU - Jan E A M van Bergen AU - Petra F G Wolffs TI - Low positivity rate after systematic screening for <em>Trichomonas vaginalis</em> in three patient cohorts from general practitioners, STI clinic and a national population-based chlamydia screening study AID - 10.1136/sextrans-2012-051010 DP - 2013 Sep 01 TA - Sexually Transmitted Infections PG - 532--534 VI - 89 IP - 6 4099 - http://sti.bmj.com/content/89/6/532.short 4100 - http://sti.bmj.com/content/89/6/532.full SO - Sex Transm Infect2013 Sep 01; 89 AB - Objective The goal of this multi-cohort study is to investigate the positivity rate of Trichomonas vaginalis (TV) among three distinct Dutch patient populations and its relation with Chlamydia trachomatis (CT) positivity. Few studies have been performed in Europe where TV positivity rate seems to be low. Additionally, the majority of earlier studies have focused on high risk or specific populations. Methods A random selection of men and women from a national population-based chlamydia screening, attendees of a sexually transmitted infections (STI) clinic and a non-selected population from general practitioners (GPs) were systematically screened for TV and CT using PCR. The associations among TV and CT co-infection, age and gender were studied. Results A total of 2079 individuals were studied. A TV positivity rate of 1.5% was observed in the medium risk GP cohort followed by 0.7% in the low risk population-based cohort and 0.6% in the high risk STI clinic. TV was found in 0.7% of CT positives and a similar 1.1% among CT negatives. All TV positive individuals in this study were women. Conclusions The positivity rate of TV was low (&lt;2%) and comparable in all three populations studied. We found no association between TV and CT infection.