PID is the acronym for Pelvic Inflammatory Disease often termed Female Genital Infection. Pelvic Inflammatory Disease is an infection in the female reproductive organs that includes organs like the uterus, fallopian tube, and ovaries spreading upwards from the cervix to the uterus. The common bacteria involved in the cause of Pelvic Inflammatory Disease are Chlamydia trachomatis and Neisseria Gonorrhoeae.