A naturally occurring case of Tyzzer's disease due to infection with Bacillus piliformis in a wolf-dog hybrid resulted in widely disseminated lesions, including severe myocarditis, hepatitis, enterocolitis, intestinal leiomyositis, and adrenal cortical adenitis. Previously reported lesions for canine Tyzzer's disease have been limited to hepatic necrosis and a necrotizing enterocolitis.
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