Prevalence of Chlamydia trachomatis, Neisseria gonorrhoeae and Mycoplasma genitalium in asymptomatic patients under 30 years of age screened in a French sexually transmitted infections clinic

Background: An increasing prevalence of sexually transmitted infections (STI) has been noted in France over the past decade. Asymptomatic carriage may be high in patients infected with Chlamydia trachomatis attending free and anonymous screening centres (CDAG) and information, diagnosis and screening centres for STI (CIDDIST). In these centres, systematic C. trachomatis detection is recommended in women <= 25 years and in men <= 30 years. Objectives: This study aimed at estimating the prevalence of C. trachomatis, Neisseria gonorrhoeae and Mycoplasma genitalium in asymptomatic patients younger than 30 years attending a CDAG-CIDDIST. Material and Methods: A free systematic screening for C. trachomatis, N. gonorrhoeae and M. genitalium was offered to asymptomatic subjects under 30 years attending the Montpellier CDAG-CIDDIST from April to August 2009. Pathogens were identified by PCR in first void urine samples. Results: Of the 1381 subjects included (53.8% women and 46.2% men), 105 (42.9% men and 57.1% women) tested positive for C. trachomatis (7.6%, 95% CI [6.3;9.13]); eight (seven men and one woman) tested positive for M. genitalium (0.58% [0.2;1]) of whom two were infected with C. trachomatis; five (two men and three women) tested positive for N. gonorrhoeae (0.36% [0.1;0.8]) of whom three were infected with C. trachomatis. Conclusion: This study confirmed the need for C. trachomatis screening in all patients under 30 years. Our results did not support a systematic screening for N. gonorrhoeae and M. genitalium in urine samples in this kind of facility.