Chlamydia and Mycoplasmal Mucosal Infections By Sheldon R Morris, MD, MPH, University of California San Diego Reviewed / Revised Jan 2023 View Patient Education Symptoms and Signs Diagnosis Treatment Key Points More Information Topic Resources Keratoderma Blennorrhagicum... Conjunctivitis in Chlamydial... Balanitis in Chlamydial Reactive... Sexually transmitted urethritis, cervicitis, proctitis, and pharyngitis (that are not due to gonorrhea) are caused predominantly by chlamydiae and less frequently by mycoplasmas.