The following images belong to an 8-month-old Quarter Horse colt from Kansas with a history of lethargy, inappetence, and abdominal pain that worsened over approximately 2 weeks. The colt died and a necropsy was performed. On gross examination, the large colon exhibited changes consistent with infarction. The cranial mesenteric artery contained a thrombus and on histopathology, the following was identified.
Image 1: 2X objective
Image 2: 10X objective
Strongylus vulgaris, is a member of the Strongylinae. The 4th and 5th larval stages migrate through the arterial system and cause verminous arteritis with marked intimal thickening and thrombus formation that can block arteries, causing infarction of intestinal walls commonly associated with anorexia, pyrexia, colic and death. Foals and yearlings are most commonly affected.
Case provided by Dr. Giselle Cino.
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