关键词: 三带喙库蚊, 流行性乙型脑炎, 分布

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