Vol. 9, Issue 10, Part A (2023)

Abstract
This case report highlights the association of Chlamydia trachomatis infection leading to development of ankylosing spondylitis. A young promiscuous adult presented with a bubo in left groin for 10 days in STI clinic in Government Medical College Hospital, Nagpur. He gave history of urethral discharge thrice in a year. He also had low backache for 3-4 months and recently developed pain in the left knee. Nonspecific investigations revealed raised inflammatory markers and IgM and IgG antibodies against C trachomatis. C trachomatis antigen was demonstrated by direct fluorescent antibody test. The infection responded to 21-day course of doxycycline. Joint pain responded to non-steroidal anti-inflammatory drugs.