You test a patient for sexually transmitted infections (STIs) at her request. She tests positive for Chlamydia trachomatis infection. You give her medication for the infection, and you counsel her to refrain from having sex with anyone—especially with anyone with whom she has had sex in the past 60 days, until those persons are treated. You ask her to encourage her recent sex partners to be tested and, if necessary, treated. You also provide patient education about chlamydia. You suggest strongly that the patient return for a routine retest and examination in 6 months, explaining carefully that any of her partners who are not effectively treated for chlamydia may reinfect her.