Abstract:

Objective To investigate the trends of Culex tritaeniorhynchus population dynamics in Liaoning province and to confirm that whether they carry Japanese encephalitis(JE)or not, which can support a scientific basis for establishing the strategy of prevention and control of Japanese encephalitis virus. Methods Culex tritaeniorhynchus, captureusing mosquito-lured lamp in 14 cities of Liaoning province during 2006-2013, were used to investigate the population composition and distribution and seasonality. Results Populations of Cx. tritaeniorhynchus in Liaoning province are mainly distributed in three cities, Dandong, Dalian and Panjin city, Dandong which has the highest distribution, the ratio of Culex is 78.43%, and the highest density is up to 780.20 Culex/(equipment·h) in 2007. In addition, Cx. tritaeniorhynchus were captured in Dalian, Panjin, Yingkou, Huludao and Jinzhou cities in different months. The highest density of Culex is appeared in September.Conclusion Culex mainly distributed in paddy growing areas of coastal cities in Liaoning province, including Dandong, Dalian, Panjin and Huludao;the most serious areas is Dandong city with the highest density and highest viral infection. In Lioaoning provience, there was a coincidence of early populations, high density and high JE infection. This phenomenon proves there is a relationship of Culex population trends and morbidity of JE, therefore, investigating the incidence of JE and the trends of Culex could not be ignored.

Key words: Culex tritaeniorhynchus, Japanese encephalitis, Distribution

摘要：

目的 掌握辽宁省三带喙库蚊的种群动态,为制定流行性乙型脑炎(乙脑)防制策略提供科学依据。方法 2006-2013年在辽宁省14个市采用诱蚊灯法开展三带喙库蚊种群数量和分布以及季节消长调查。结果 辽宁省三带喙库蚊种群主要分布于丹东、大连和盘锦市,全省三带喙库蚊构成比最高的是丹东市(78.43%),其中2007年密度最高达到780.20只/(台·h),另外大连、盘锦、营口、葫芦岛和锦州市在不同年份也捕获到少量的三带喙库蚊;三带喙库蚊密度高峰集中在每年9月。结论 辽宁省三带喙库蚊主要分布在沿海城市的稻田种植区,包括丹东、大连、盘锦和葫芦岛市;密度和构成比最高地区为丹东市。辽宁省为乙脑疫情高发地区,三带喙库蚊出现早、密度高,可见三带喙库蚊种群动态与乙脑发生关系密切,因此密切调查乙脑疫情和三带喙库蚊的种群动态分布不容忽视。

关键词: 三带喙库蚊, 流行性乙型脑炎, 分布