Background
Reactive arthritis, Reiter's syndrome is one of the seronegative arthropathies, that can be associated with intestinal infections (Shigella, Salmonella, Yersinia, Campylobacter jejuni, Clostridium difficile), sexual infections (Chlamydia trachomatis, Ureaplasma urealyticum) and lung infections (Chlamydia pneumoniae, Mycoplasma pneumoniae). Reiter's syndrome is an arthritis that occurs 1-4 weeks in response to an infection with a specific organism with urogenital or enteral gate, especially in HLA-B27 positive individuals.