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Yersiniosis in the liver of a free-ranging North American beaver.
Bacterial infection causes multifocal, random, necrosis throughout the hepatic parenchyma. Large, central colonies of the causative agent, Yersinia pseudotuberculosis are surrounded by mild neutrophilic inflammation and necrotic cell debris.
(Photo Courtesy of D. Campbell, Canadian Wildlife Health Cooperative Ontario-Nunavut)
