A Wildlife Disease Case Study from SCWDS Briefs
April 2012 Issue
Polyarthritis in Raccoons

Within affected joints, synovial structures were inflamed and necrotic with fibrinous exudate. A normal (Figure 1) and arthritic stifle (Figure 2) from the same raccoon are shown below.
Typical rule-outs for polyarthritis in wild and domestic animals include sepsis (overwhelming bacteria in the blood stream), some tick-borne diseases, Mycoplasma sp. infection, trauma, and some immune-mediated diseases. In free-ranging animals with multiple swollen joints and no signs of trauma, sepsis is the most likely cause; however, in these cases there was no evidence of sepsis or trauma.

Comparison with Mycoplasma sp. isolates in GenBank® strongly suggested that this was an undescribed Mycoplasma sp. that was most closely related to Mycoplasma spp. found in the upper respiratory tract of bottle-nosed dolphins, Mycoplasma equigenitalium associated with congenital disorders and infertility in horses, and Mycoplasma elephantis....
Source: SCWDS Briefs – A Quarterly Newsletter from the Southeastern Cooperative Wildlife Disease Study College of Veterinary Medicine - April 2012, Vol.28, No. 1 [pdf]
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