<prompt> Gold standard investigation in diagnosing PID is: March 2005Anti chlamydial AbLaparoscopyUSGBlood leucocyte count  <response>: Ans. B: Laparoscopy Investigations in a case of PID: Physical examination Pregnancy test to rule out anectopic pregnancy White blood cell test to rule out appendicitis Genital culture to look for gonorrhea and chlamydia. An endometrial biopsy tissue sample removed from the endometrium Sonogram if abscesses are suspected Culdocentesis fluid sample taken from uterine sac Laparoscopy are done. Laparoscopy is considered the gold standard for diagnosis of PID, because it allows visualization of the pelvic organs. The procedure involves inseing a tiny, flexible lighted tube through a small incision just below the navel. This procedure is recommended when results of the preliminary tests physical exam, blood tests and cultures are unclear. 