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Leucocytoclastic vasculitis associated with Staphylococcus intermedius in the pastern of a horse
  1. å. I. Risberg, DVM1,
  2. C. B. Webb, DVM1,
  3. A. J. Cooley, DVM2,
  4. S. F. Peek, BVSc, PhD, MRCVS1 and
  5. B. J. Darien, DVM, MS1
  1. 1Department of Medical Sciences
  2. 2Department of Pathological Sciences, University of Wisconsin, School of Veterinary Medicine, 2015 Linden Drive, Madison, WI 53706-1102, USA
  1. Correspondence to Dr Darien

Abstract

A pregnant quarterhorse mare became acutely lame as a result of severe swelling of its right hind leg, thought to have been caused by a fracture or a muscle tear. Diagnostic procedures ruled out a traumatic musculoskeletal cause and a physical examination revealed chronic pastern dermatitis (‘scratches’/‘grease heel’). Histopathological evaluation of biopsy samples from the right hind leg was consistent with a leucocytoclastic vasculitis, and culture yielded Staphylococcus intermedius. The treatment and infectious causes of pastern dermatitis are discussed.

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      Footnotes

      • Dr Cooley’s present address is North Carolina Department of Agriculture and Consumer Services, Rollins Animal Disease Diagnostic Laboratory, Veterinary Division, PO Box 12223, Raleigh, NC 27605, USA

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