[Non-gonococcal urethritis caused by Chlamydia trachomatis: factors affecting its incidence].

A retrospective study to investigate the relationship between the isolation of Chlamydia trachomatis and other factors occurring in 146 patients suffering of non-gonococcal urethritis, has been released 39 being positive for C. trachomatis. The relationship between the isolation of C. trachomatis and previous antibiotic treatment, age, sexual different contacts in the last month and year has been studied. The main feature affecting the isolation is the absence of antimicrobial therapy a previously to the specimen collection and being performed after four days post-contact.