Abstract
Short of an effective vaccine, successful control of sexually transmitted Chlamydia trachomatis infections will require broadly based screening programs. This conclusion stems from several observations. First, chlamydial infections are highly prevalent, especially among adolescents and young adults, and are more widely distributed throughout all socioeconomic, racial, and ethnic groups than other bacterial sexually transmitted diseases.1 Second, most chlamydial infections in women and many in men do not cause symptoms. Third, once acquired, chlamydial infections may persist for months, resulting in a long period of potential transmission. And finally, these infections are treatable but if left untreated can cause pelvic inflammatory . . .