The article “The Challenge of Pelvic Inflammatory Disease” (March 1, 2006, page 859) contained an error in the first paragraph of the “Treatment” section on page 861. The first sentence of this paragraph incorrectly referred to a low index of suspicion for pelvic inflammatory disease (PID), rather than a high index of suspicion. The sentence should have read as follows: “Physicians should have a high index of suspicion for PID and should initiate therapy in all women who are at risk of PID and uterine, adnexal, or cervical motion tenderness on bimanual examination with no apparent cause.” The online version of this article has been corrected.