Pelvic inflammatory disease (PID) is a clinical syndrome characterized by infection and inflammation of the upper female genital tract. This process results from the ascending spread of microorganisms in the vagina or cervix to the structures of the upper female genital tract, with potential infection and inflammation of the endometrium, fallopian tubes, pelvic peritoneum, and, in some instances, formation of tubo-ovarian abscess.[1,2] In recent years, the range of microorganisms believed to play a major role in this process has expanded.[3] Typically, PID is classified as either acute (less than or equal to 30 days duration), subclinical (asymptomatic disease of unknown duration), or chronic (greater than 30 days duration) (Figure 1).[1] The diagnosis of PID may be challenging as women with PID often experience subtle clinical manifestations, and precise diagnostic criteria are lacking.[4] Women who experience PID may have adverse reproductive sequelae, including infertility, ectopic pregnancy, and chronic pelvic pain.[5,6] Effective parenteral and oral treatments are available for PID that provide short-term clinical benefit and reduce the risk of developing long-term complications.[1,7] When considering the severe potential long-term consequences associated with PID, it is extremely important for clinicians to diagnose PID and promptly provide appropriate and effective antimicrobial therapy.
