<prompt> Definitive criteria for PID isTubo-Ovarian abscess on USGCervical erosionTemparature 37.5 degreesInfeility  <response>: Chronic pelvic inflammatory disease manifest as Hydrosalpinx Chronic pyosalpinx Tubo ovarian abscess or cyst Tubercular tubovarian masses Ref: Shaw Gynecology 17 e pg 340. 