Echocardiographic diagnosis of endocarditis in a bull.

A 2-year-old Charolais bull was examined because of lameness that developed after infection of a tail laceration. A systolic murmur was auscultated during the routine physical examination. A diagnosis of endocarditis and polyarthritis secondary to septicemia from the tail lesion was made. The diagnosis was supported by echocardiography and blood cultures, which yielded Corynebacterium pyogenes. The clinical diagnosis was confirmed at necropsy.