[HLA-antigens and some pathogenetic aspects of reactive arthritis].

Aim: Investigation of associations of reactive arthritis (ReA) with histocompatibility antigens class I and II and determination of new approaches to assessment of association ReA with antigen HLA B27.

Materials And Methods: 118 ReA patients with associated intestinal and 82 ReA patients with associated urogenital infection were studied. The infection was identified bacteriologically, with agglutination reaction, enzyme immunoassay, direct and indirect immunofluorescence, culturing.

[Reactive arthritis: terminology, etiology and pathogenesis].

Different serovars of Y. enterocolitica, Y. pseudotuberculosis, Acinetobacter calcoaceticus, and Pseudomonas pauimobilis were isolated from the synovial fluid of 23 out of 34 patients with Yersinia-triggered arthritis by a new bacteriological method based on the selection of the optimal conditions for microorganism culturing; in some cases the strains were isolated repeatedly.

[Approach to evaluation of the indicators of Yersinia infections in reactive and rheumatoid arthritis].

A total of 140 patients with reactive arthritis due to Yersinia infection were under observation for 2-10 years. A group of 104 patients with erosive rheumatoid arthritis served as control for analysis of the results of bacteriological and serological studies. The bacteriological analysis of the feces, urine, smears of the feces and blood were made repeatedly.