Abstract:

Objective　The species variation of and seasonal fluctuations in the vector of Japanese encephalitis in Wuhan from 2006 to 2009 were investigated to provide the basis for the prevention and control of the disease and the vector mosquitoes.  Methods　The lamp trap method was applied. Results　A total of 48 097 mosquitoes of 6 species, 4 genera and 1 family were captured from 2006 to 2009. The dominant species was Culex tritaeniorhynchus, accounting for 78.1% of the total captures. Marked seasonal fluctuations in the adult mosquito density were observed in the district; the activity peak was usually from June to August, while adult mosquito activities substantially weakened from January to March and from November to December. Conclusion　The seasonal fluctuations in the number of Cx. tritaeniorhynchus, the dominant species in Huangpi district, were noticeable. In preliminary conclusion, Cx. tritaeniorhynchus is the major vector of Japanese encephalitis in the district.

Key words: Adult mosquito density, Species composition, Seasonal fluctuation

摘要：

目的　掌握武汉市2006－2009年流行性乙型脑炎（乙脑）媒介的种群变化和季节消长，为开展乙脑和蚊虫防制工作提供科学依据。方法　诱蚊灯法。结果　2006－2009年捕获蚊类1科4属6种，共48 097只，三带喙库蚊为优势种，占捕蚊总数的78.1%。全区成蚊密度季节消长明显，活动高峰一般在6－7月；1－3月和11－12月成蚊活动较少。结论　三带喙库蚊为黄陂区优势蚊种，季节消长明显，初步推断三带喙库蚊为黄陂区乙脑的主要传播媒介。

关键词: 成蚊密度, 种群构成, 季节消长