A 19 year old sexually active woman presents to your clinic with left lower crampy abdominal pain for the last week. Bimanual exam elicits cervical motion tenderness, although gram stain of vaginal discharge is negative for pathogenic organisms. The pain is worse during and right after menstruation.
Labs: Inclusion bodies in Giemsa stain. Obligate intracellular bacteria. PCR is also a useful tool.