Pelvic inflammatory disease

Pelvic inflammatory disease (PID) is an inflammation of the uterus, fallopian tubes, ovaries and surrounding tissue. It can be caused by a variety of bacteria or viruses, including sexually transmitted infections (STIs). The bacteria most frequently responsible are Neisseria gonorrhoeae and Chlamydia trachomatis, but bacteria normally found in the vagina and cervix can also be the cause.