中国媒介生物学及控制杂志 ›› 2011, Vol. 22 ›› Issue (1): 77-79.

• 调查研究 • 上一篇    下一篇

2005-2008年浙江省仙居县流行性乙型脑炎监测结果分析

张意坚, 应永平, 王建华, 林桂伟   

  1. 仙居县疾病预防控制中心,浙江 仙居 317300
  • 收稿日期:2010-09-26 出版日期:2011-02-20 发布日期:2011-02-20
  • 作者简介:张意坚(1960-),男,副主任医师,主要从事流行病学研究。Email: cdpczyj@163.com

Analysis of the monitoring results on the epidemic Japanese encephalitis in Xianju county from 2005 to 2008

ZHANG Yi-jian, YING Yong-ping, WANG Jian-hua, LIN Gui-wei   

  1. Xianju Center for Disease Control and Prevention, Xianju 317300, Zhejiang Province, China
  • Received:2010-09-26 Online:2011-02-20 Published:2011-02-20

摘要:

目的 了解流行性乙型脑炎(乙脑)流行规律, 及时发现和控制疫情。方法 按《全国流行性乙型脑炎监测方案》进行乙脑病例、疑似病例、宿主动物、蚊虫媒介及健康人群监测。结果 仙居县2005-2008年监测疑似病例137例,实验室确诊乙脑10例,发病率为0.52/10万,无死亡病例;发病年龄均在7岁以下,发病时间集中在7月,有完整乙脑免疫史的1例;6月开始蚊密度进入高峰季节,三带喙库蚊是仙居县的主要蚊种之一,占捕获蚊虫总数的43.5%,2007年从捕获的蚊虫中分离到2株乙脑病毒,人群发病时间与蚊虫媒介密度升高相一致;宿主动物猪的乙脑总感染率为67.4%,猪乙脑感染率进入高峰季节比人群发病早1个月。结论 仙居县广泛存在乙脑流行的自然因素,是乙脑的流行区,消灭乙脑免疫空白是防止和减少乙脑发生的最有效措施,开展乙脑监测能及时发现和控制疫情。

关键词: 流行性乙型脑炎, 监测, 三带喙库蚊, 宿主

Abstract:

Objective To understand the epidemiological characteristics of Japanese encephalitis (JE) and to provide the basis for early detection and control. Methods Confirmed cases, suspicious cases, host animals, mosquito vectors and healthy population were monitored according to the National Japanese Encephalitis Monitoring Program. Results From 2005 to 2008, 137 suspected JE cases and 10 laboratory-confirmed cases were reported in the county with an incidence of 0.52/105. No death case was found. All cases were children under 7 years of age and clustered in July. One patent had complete JE vaccination history. The mosquito density began to surge from June, with Culex tritaeniorhynchus being the predominant species accounting for 43.5% of all captured vectors in this area. Two strains of JE virus were isolated from mosquitoes captured in 2007. The time of onset in human was consistent with the spike in mosquito density. The overall infection rate in the host animal swine was 67.4%, and the peak of infection in these animals appeared one month earlier than in human. Conclusion Natural factors in favor of JE epidemics and prevalence of this disease were found in Xianju county. Filling the immunization gap is the most effective way to prevent and reduce the occurrence of this disease. JE monitoring is helpful for early detection and epidemic control.

Key words: Japanese encephalitis, Surveillance, Culex tritaeniorhynchus, Host

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