Primary care physicians should screen all sexually active women aged 25 and younger, and others at high risk, for infection with Chlamydia trachomatis, which affects an estimated 3 million women and men each year. The recommendation (available at http://www.ahcpr.gov/clinic/uspstf/uspschlm.htm) was made by the United States Preventive Services Task Force, which said new urine tests make such screening more feasible than before.
Vastag B. Screen for Chlamydia. JAMA. 2001;285(19):2439. doi:10.1001/jama.285.19.2439-JHA10004-3-1