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Triggering infections in reactive arthritis.

V V Valtonen, M Leirisalo, P J Pentikäinen

    Annals of the Rheumatic Diseases
    |June 1, 1985
    PubMed
    Summary
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    Certain microbes can trigger reactive arthritis in HLA-B27 positive individuals. This study identified Yersinia enterocolitica and Chlamydia trachomatis as common culprits, with minimal impact on clinical presentation.

    Area of Science:

    • Immunology
    • Microbiology
    • Rheumatology

    Background:

    • Reactive arthritis is an inflammatory condition often triggered by specific microbial infections.
    • The human leukocyte antigen HLA-B27 is strongly associated with an increased risk of developing reactive arthritis.
    • Identifying the causative infectious agent is crucial for understanding disease mechanisms.

    Purpose of the Study:

    • To identify the specific microbial triggering infections in a cohort of HLA-B27 positive patients diagnosed with reactive arthritis.
    • To investigate the correlation between identified causative agents and the clinical manifestations of reactive arthritis.

    Main Methods:

    • Serological and culture-based methods were employed to detect infections.
    • Fifty consecutive HLA-B27 positive patients with reactive arthritis were included in the study.

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  • Patients were assessed for preceding infections and clinical symptoms, including fever.

    • Main Results:

    • Yersinia enterocolitica (12 patients) and Chlamydia trachomatis (11 patients) were the most frequently identified triggering agents.
    • Group A streptococci and Staphylococcus aureus were suggested as triggers in some patients based on antibody titres.
    • No preceding infection was identified in 13 patients.
    • Fever was notably absent in patients with Chlamydia trachomatis infections compared to those with enterobacterial or streptococcal/staphylococcal infections.

    Conclusions:

    • Yersinia enterocolitica and Chlamydia trachomatis are significant triggers of reactive arthritis in HLA-B27 positive individuals.
    • The specific infectious agent appears to have a limited impact on the overall clinical picture of reactive arthritis, with fever being a key differentiator.
    • Further research into the immunopathogenesis of reactive arthritis is warranted.