Systemic Granulomatous Disease in a Horse Grazing Pasture Containing Vetch ( <i>Vicia</i> sp.)

Abstract

A lo-year-old quarterhorse gelding was presented to theCalifornia Veterinary Diagnostic Laboratory in early Mayfor euthanasia and necropsy. Presenting clinical signs in-cluded weight loss; severe generalized dermatitis; dependentedema in the limbs, preputial sheath, and ventral abdomen;lymphadenomegaly of superficial and palpable lymph nodes;