[Prevalence of Chlamydia trachomatis infection, as evaluated by molecular biology methods].

Background: To determine the prevalence of Chlamydia trachomatis infection in our area by molecular methods.

Methods: We describe the combined results of three studies carried out in the city of Barcelona including a total of 408 women considered to be at high risk for acquiring a sexually transmitted disease (STD). The first study was performed in 94 women attended at a public STD clinic located downtown, the second in 112 women attended at the Hospital Clinic and the third in 202 women attended at Hospital Vall d'Hebron (both third-level hospitals).