Gaydos Joseph K, Zabek Erin, Raverty Stephen
Wildlife Health Center-Orcas Island Office, University of California, Davis, School of Veterinary Medicine, 942 Deer Harbor Road, Eastsound, Washington 98245, USA.
J Wildl Dis. 2009 Oct;45(4):1182-6. doi: 10.7589/0090-3558-45.4.1182.
An emaciated, free-ranging, sub-adult, male beaver (Castor canadensis) was found dead and was necropsied. Microscopically, the beaver had acute necrotizing hepatitis and splenitis with florid lobulated colonies of extracellular coccobacilli. Intravascular septic emboli were identified in lung, small intestine, and kidney, and discrete ulcers with scattered superficial extracellular accumulation of coccobacilli were noted on tail margins and plantar surfaces of the hind feet. Yersinia pseudotuberculosis was cultured on Columbia blood and MacConkey agar and identified by API 20E. Based on the pathology and acute mortality described in this case, as well as historical reports of Y. pseudotuberculosis related mortality in other beavers, this species could serve as a public health sentinel for localized occurrences of this bacterium.
一只消瘦的、自由放养的亚成年雄性海狸（加拿大河狸）被发现死亡并进行了尸检。显微镜下，这只海狸患有急性坏死性肝炎和脾炎，伴有明显的细胞外球杆菌分叶状菌落。在肺、小肠和肾脏中发现了血管内败血性栓子，并且在尾巴边缘和后足跖面发现了离散的溃疡，伴有球杆菌散在的浅表细胞外积聚。在哥伦比亚血琼脂和麦康凯琼脂上培养出假结核耶尔森菌，并通过API 20E进行鉴定。基于该病例中描述的病理学和急性死亡率，以及其他海狸中假结核耶尔森菌相关死亡率的历史报告，该物种可作为这种细菌局部发生情况的公共卫生哨兵。
