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Circulating immune complex in bilharzial arthropathy.

M A Bebars1, S A Soffar, M M Abbas

  • 1Department of Parasitology, Faculty of Medicine, Ain-Shams University, Cairo, Egypt.

Journal of the Egyptian Society of Parasitology
|April 1, 1992
PubMed
Summary

Immune complex (IC) levels are elevated in individuals with bilharziasis and bilharzial arthropathy, suggesting a role in disease development. Higher IC levels in synovial fluid correlate with serum levels, indicating local inflammation in affected joints.

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Area of Science:

  • Immunology
  • Rheumatology
  • Parasitology

Background:

  • Immune complexes (IC) are implicated in various inflammatory joint diseases.
  • Bilharzial arthropathy is a significant complication of Schistosoma infection, but its pathogenesis remains incompletely understood.

Purpose of the Study:

  • To investigate the levels of immune complexes (IC) in patients with bilharzial arthropathy and related conditions.
  • To explore the correlation between IC levels in serum and synovial fluid in joint effusions.

Main Methods:

  • Enzyme-linked immunosorbent assay (ELISA) was used to quantify IC levels.
  • Serum samples were collected from 100 individuals across four groups: bilharzial arthropathy, bilharziasis, rheumatoid arthritis, and healthy controls.
  • Synovial fluid was analyzed from four patients with knee joint effusions.

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Main Results:

  • Significantly elevated IC levels were observed in individuals with bilharzial infection (both with and without arthropathy) compared to controls.
  • IC levels were higher in intestinal bilharziasis than in urinary bilharziasis.
  • IC levels were markedly higher in bilharzial arthropathy cases than in uncomplicated bilharziasis.
  • Synovial fluid IC levels exceeded serum levels, showing a positive correlation.

Conclusions:

  • Elevated IC levels are associated with bilharzial infections and are particularly pronounced in bilharzial arthropathy.
  • The findings support the role of immune complexes in the pathogenesis of bilharzial arthropathy.
  • IC levels in synovial fluid may serve as an indicator of local joint inflammation in this condition.