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[Postinfectious (reactive) arthritis--an important differential diagnosis to juvenile chronic arthritis (JCA)

L Schuchmann, H Michels, K Renz

    Klinische Padiatrie
    |January 1, 1982
    PubMed

    Insights

    Postinfectious arthritis in children, often caused by Salmonella or Shigella, presents with clear causes and a shorter course than juvenile chronic arthritis. Genetic predisposition, indicated by HLA-B27, is common in this condition.

    Area of Science:

    • Pediatric Rheumatology
    • Infectious Diseases
    • Immunogenetics

    Context:

    • Postinfectious arthritis (PIA) is a reactive arthritis following enteric infections.
    • Distinguishing PIA from juvenile chronic arthritis (JCA) is crucial for appropriate management.
    • Enteric pathogens like Salmonella, Yersinia, Brucella, and Shigella are implicated in PIA etiology.

    Purpose:

    • To describe the clinical presentation, laboratory findings, and disease course of pediatric patients with postinfectious arthritis.
    • To differentiate postinfectious arthritis from juvenile chronic arthritis based on etiological clarity, clinical course, and radiographic findings.
    • To investigate the association between human leucocyte antigen HLA-B27 and postinfectious arthritis in pediatric cases.

    Summary:

    • This study details 10 pediatric cases of postinfectious arthritis, characterized by preceding enteritis and fever.
    • PIA exhibits a clearer etiology and pathogenesis than JCA, with a shorter disease duration, preserved joint function, and normal X-ray findings.
    • A high prevalence (90%) of human leucocyte antigen HLA-B27 was observed, suggesting a genetic predisposition similar to juvenile spondylitis ankylosans and Reiter's syndrome.

    Impact:

    • Provides a clearer understanding of postinfectious arthritis in children, aiding in differential diagnosis.
    • Highlights the role of genetic factors (HLA-B27) in the pathogenesis of pediatric postinfectious arthritis.
    • Contributes to the classification of Reiter's syndrome as a potential subtype of postinfectious arthritis.

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