加州西尼罗病毒今年已致528人感染32人死亡 洛杉矶县占304例
加利福尼亚州消息，加州公共卫生局截至11月6日的最新数据显示，加州今年西尼罗病毒人类感染病例已达528例，死亡32例，波及23个县，病死率约6%，为近五年最高水平。洛杉矶县疫情最重，报告304例感染和13例死亡，约占全州病例的58%；橙县报告7例死亡，死亡病例分布在9个县。10月下旬至11月6日期间，全州新增76例感染，显示入冬前蚊媒传播仍在继续。监测还发现29个县共4098份蚊子样本呈阳性，25个县共772只死亡鸟类感染病毒。西尼罗病毒主要通过受感染的库蚊传播，可引发脑膜炎、脑炎、瘫痪等严重神经侵袭性疾病，目前尚无获批的人用疫苗和特效抗病毒治疗方法。加州公共卫生局提醒居民清除积水、使用驱蚊剂，出现发热、头痛等症状及时就医。相关数据发布于加州公共卫生局西尼罗病毒官网。
West Nile Virus Has Infected 528 People and Killed 32 in California This Year; Los Angeles County Accounts for 304 Cases
CALIFORNIA — The latest data from the California Department of Public Health, as of November 6, show West Nile virus has infected 528 people in California this year and killed 32, across 23 counties, a case-fatality rate of about 6% and the highest level in nearly five years. Los Angeles County is the hardest hit, reporting 304 infections and 13 deaths, about 58% of the state's cases; Orange County reported 7 deaths, with deaths spread across nine counties. From late October to November 6, the state added 76 new infections, showing mosquito-borne transmission continuing into the start of winter. Surveillance also found 4,098 mosquito samples testing positive across 29 counties and 772 dead birds infected across 25 counties. West Nile virus is spread mainly by infected Culex mosquitoes and can cause meningitis, encephalitis, paralysis and other serious neuroinvasive disease; there is no approved human vaccine or specific antiviral treatment. The department urges residents to eliminate standing water, use insect repellent and seek care promptly for symptoms such as fever and headache. The data were published on the department's West Nile virus website.
来源：加州公共卫生局
发布：GSM·美国（发布链接）
图片来源：图：库蚊。Wikimedia Commons，GFDL 1.2。 / Photo: Culex mosquito. Via Wikimedia Commons, GFDL 1.2.
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