Rimoldi Guillermo M, Moeller Robert B
California Animal Health and Food Safety Laboratory System (CAHFS), Davis and Tulare Branches, 620 West Health Sciences Drive, Davis, CA 95616, USA.
J Vet Med. 2013;2013:829532. doi: 10.1155/2013/829532. Epub 2013 Dec 2.
An adult Angus cow developed hyperthermia, prostration, and respiratory distress, dying 36 hours after the onset of clinical signs. The main finding during postmortem examination was a severe focally extensive pneumonia. Icterus and a chronic mastitis were also noticed. Histologic examination of the lungs detected fibrinonecrotic pneumonia, with large number of oat cells and intralesional Gram-negative bacterial colonies. Samples from lung lesions were collected, and a pure growth of Escherichia fergusonii was obtained. E. fergusonii is a member of Enterobacteriaceae, related to Escherichia coli and Salmonella sp. In veterinary medicine, E. fergusonii has been reported in calves and sheep with clinical cases suggestive of salmonellosis; in a horse and a goat with enteritis and septicemia; and in ostriches with fibrinonecrotic typhlitis. To our knowledge, this report represents the first description of E. fergusonii associated with an acute pneumonia in cattle.
一头成年安格斯牛出现高热、虚脱和呼吸窘迫，在临床症状出现36小时后死亡。尸检的主要发现是严重的局灶性广泛性肺炎。还发现有黄疸和慢性乳腺炎。肺部组织学检查发现纤维蛋白坏死性肺炎，有大量燕麦细胞和病灶内革兰氏阴性菌菌落。采集了肺部病变样本，获得了弗格森埃希氏菌的纯培养物。弗格森埃希氏菌是肠杆菌科的一员，与大肠杆菌和沙门氏菌属有关。在兽医学中，已报道在犊牛和绵羊中出现弗格森埃希氏菌，临床病例提示沙门氏菌病；在一匹马和一只山羊中出现肠炎和败血症；在鸵鸟中出现纤维蛋白坏死性盲肠炎。据我们所知，本报告是首次描述弗格森埃希氏菌与牛急性肺炎有关。
