Merck Manual

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Professional Version

Polyarthritis in Dogs and Cats

By

Joseph Harari

, MS, DVM, DACVS, Veterinary Surgical Specialists, Spokane, WA

Last full review/revision Nov 2020 | Content last modified Sep 2022

Clinical signs of a polyarthritis include fever, lameness, swollen joints, lethargy, and inappetence.

Treatments involve longterm glucocorticoid therapy or other immunosuppressive medications such as azathioprine or cyclophosphamide.

Prognosis in most cases is guarded or poor, with relapses common.

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