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Caprine arthritis-encephalitis: clinicopathologic study.

J C Woodard, J M Gaskin, P W Poulos

    American Journal of Veterinary Research
    |December 1, 1982
    PubMed
    Summary
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    Caprine arthritis-encephalitis virus causes chronic arthritis in goats, leading to debilitating lameness and joint damage. Pathological changes in affected goats resemble human rheumatoid arthritis.

    Area of Science:

    • Veterinary Pathology
    • Immunology

    Background:

    • Caprine arthritis-encephalitis virus (CAE) infection can cause chronic arthritis in goats.
    • Introduction of infected animals can lead to herd outbreaks.

    Purpose of the Study:

    • To describe the clinical, laboratory, and pathological findings of chronic arthritis caused by CAE virus in goats.
    • To compare the observed pathology with human rheumatoid arthritis.

    Main Methods:

    • Clinical examination of affected goats.
    • Analysis of synovial fluid.
    • Pathological examination of joints, bursae, and adjacent tissues.

    Main Results:

    • High frequency of carpal hygroma and stiffness observed.
    • Progressive, debilitating lameness in 30% of affected animals.

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  • Synovial fluid showed increased lymphocytes; pathological changes included vascular injury, fibrin deposition, articular cartilage erosion, and subchondral pseudocysts.

    • Conclusions:

    • CAE virus infection leads to chronic, progressive arthritis in goats.
    • Morphological changes in goat arthritis are similar to human rheumatoid arthritis, excluding rheumatoid nodules.