Top bugs for PID are Chalmydia trachomatis (subacute, often undiagnosed) and Neisseria gonorrhoea (acute). C trachomatis is most common cause of bacterial STI. Signs include cervical motion tenderness, adnexal tenderness and purulent cervical discharge. PID may include salpingitis, endometritis, hydrosalpinx and tubo ovarian abscess. Salpingitis is risk factor for ectopic pregnancy, infertility, chronic pelvic pain and adhesions. It can lead to peri hepatitis (Fitz-Hugh-Curtis syndrome), an infection and inflammation of liver capsule and shows 'violin string' adhesions of peritoneum to liver. PID is usually treated with antibiotics to provide empiric, broad spectrum coverage of likely pathogen.