Brenner Deena, Larsen R Scott, Wack Raymund F, Agnew Dalen, Imai Denise
Veterinary Medical Teaching Hospital, University of California, Davis, California, 95616, USA.
J Zoo Wildl Med. 2007 Jun;38(2):357-62. doi: 10.1638/1042-7260(2007)038[0357:CWNVAM]2.0.CO;2.
An adult male black-necked swan (Cygnus melanocoryphus) was evaluated for a routine physical examination and West Nile virus vaccination. Nine days later, the swan was hospitalized for weakness, dehydration, tremors, and leukocytosis. Gradual clinical improvement was seen over a 2-wk course of supportive care. However, the animal became acutely weak and was found dead. Histopathology revealed severe granulomatous pneumonia and air sacculitis with dissemination to the liver, spleen, intestine, and coelom. Mycobacterial infection was confirmed by identification of acid-fast bacilli within tissue sections and by polymerase chain reaction. Concurrent West Nile virus infection was identified in sections of brain by using immunohistochemistry.
对一只成年雄性黑颈天鹅（黑颈天鹅属）进行了常规体格检查和西尼罗河病毒疫苗接种评估。九天后，这只天鹅因虚弱、脱水、震颤和白细胞增多症住院。在为期两周的支持性护理过程中，临床症状逐渐改善。然而，这只动物突然变得虚弱，随后被发现死亡。组织病理学显示严重的肉芽肿性肺炎和气囊炎，并扩散至肝脏、脾脏、肠道和体腔。通过在组织切片中鉴定抗酸杆菌以及聚合酶链反应确诊为分枝杆菌感染。通过免疫组织化学在脑切片中鉴定出同时存在西尼罗河病毒感染。
