Reactive arthritis of the joints is a non-inflammatory "sterile" inflammatory disease of the musculoskeletal system, induced by infections of extra-articular localization, especially the genitourinary or intestinal tract. Along with ankylosing spondylitis and psoriatic joint damage, reactive arthritis is included in the seronegative spondyloarthritis group, which is associated with the defeat of the iliac-sacral joint and spine.