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Arthritides, Post-Infectious

An aseptic, inflammatory arthritis developing secondary to a primary extra-articular Infection, most typically of the Gastrointestinal Tract or Urogenital System. The initiating trigger pathogens are usually Shigella; Salmonella; Yersinia; Campylobacter; or Chlamydia trachomatis. Reactive arthritis is strongly associated with HLA-B27 Antigen.