Definitive criteria for PID is
Chronic pelvic inflammatory disease manifest as Hydrosalpinx Chronic pyosalpinx Tubo ovarian abscess or cyst Tubercular tubovarian masses Ref: Shaw Gynecology 17 e pg 340.
Tubo-Ovarian abscess on USG
Cervical erosion
Temparature > 37.5 degrees
Infeility
Infections of the genital tract