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[Postinfectious (reactive) arthritis--an important differential diagnosis to juvenile chronic arthritis (JCA)
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.
Abstract:
Symptoms, laboratory findings and clinical course of 10 pediatric patients suffering from postinfectious arthritis are described. The postinfectious arthritis is caused by an infection with Salmonella, Versina, Brucella or Shigella. The illness results from a preceding enteritis accompanied by fever. It differs from the juvenile chronic arthritis by the more clarified etiology and pathogenesis and particularly by the markedly shorter course, the lack of functional deterioration and by normal X-ray findings of the joint structure. In the parainfectious cases a similar pathogenesis is suggested, but the time relation is not as clear; the arthritis is diagnosed ahead of the enteritis. The human leucocyte antigen HLA-B 27 can frequently (90%) be proven in patients suffering from postinfectious arthritis. This is related to a genetic disposition of this type of arthritis as it can be observed in juvenile spondylitis ankylosans and in Reiter-syndrome, which can be considered as a special type of postinfectious arthritis.