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西尼罗河热是由蚊虫携带的黄病毒感染的 ,主要引起马、鸟类和人类发病 ,并能引起致死性脑炎 ,导致马匹、野鸟、家鹅和人的死亡。2 0 0 2年 ,美国共有 4 0个州报告有该病发生 ,感染人数为 4 15 6例 ,有 2 84例死亡〔1〕。 2 0 0 3年 ,在美国该病又发生暴发性流行 ,截至 8月 2 9?
West Nile fever is infected by mosquito-borne flaviviruses and causes mainly horses, birds and humans and causes lethal encephalitis, leading to the death of horses, wild birds, geese and humans. In 2002, a total of 40 states in the United States reported the occurrence of the disease, affecting 4 15 6 and 2 84 deaths [1]. In 2003, an outbreak of the disease took place in the United States as of August 29?