The gastrointestinal tract status (GIT) was evaluated in 23 reactive arthritis (RA) patients: in 17 after intestinal infection, in 2 after urogenital infection, and in 4 after mixed infection. All the examined were found to have signs of diffuse variously pronounced chronic inflammation of the small and large intestine, impaired barrier function of the stomach, liver disorders, and moderate-severe intestinal dysbacteriosis with developing transitory bacteraemia in most severe cases. The GIT changes were correlated with the severity of the RA course. In 20 control-group patients not afflicted with joint disease and operated on for cicatricial stricture of the oesophagus, no signs of chronic inflammation of the mucosa were revealed in the biopsy samples of the large and small intestine. The obtained results may be indicative of the role played by the GIT in the development of pathogenic processes in RA.
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