Page 323 - WSAVA2017
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In animals with inflammatory joint disease, an
underlying cause may or may not be identified. In dogs and cats, most inflammatory joint disease involves multiple joints and often has an immune-mediated component to the disease. Most infectious related joint disease in the dog involves a single joint. Exceptions include polyarthropaties associated with tick-borne illnesses such as Borrelia burgdorferi, Anaplasma phagocytophilum and Ehrlichia ewingii. In the cat, viral arthropathies may occur in which case, infectious agents will not be identified and the inflammation may either be neutrophilic, macrophagic, or lymphocytic.
In summary, analysis of synovial fluid will allow the distinction between a patient with inflammatory vs. Noninflammatory joint disease. Only occasionally will a definitive diagnosis be obtained by synovial fluid analysis alone. Therefore, once the disease process is classified as inflammatory or noninflammatory, further analysis to determine an underlying cause must be explored.
An Urban Experience

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