关键词: 媒介蚊虫, 流行性乙型脑炎, 相关性

Abstract:

Objective To analyze the correlation between the mosquito density dynamics and prevalence with the incidence of Japanese encephalitis (JE), providing the basis for prediction and prevention of this disease. Methods The monitoring was conducted in four villages, each randomly selected from a township in the east, west, south and north parts of Guiping city apiece. Mosquitoes were captured at residential rooms, pigpens and cowsheds using the same type of lamp trap at the same time of each year. The correlation between the incidence of JE and the mosquito species, density and dynamics was then analyzed. Results Mosquitoes of 7 species in 4 genera were collected in Guiping from 2003 to 2008. These species were: Culex tritaeniorhynchus, Cx. bitaeniorhynchus, Cx. pipiens quinquefasciatus, Anopheles sinensis, An. minimus, Aedes albopictus and Armigeres subalbatus. The dominant species was Cx. tritaeniorhynchus. The mosquito density peaked in April each year, with an average of above 40 / (trap·h); and maintained high from May to September at 60-500 / (trap·h), followed by a decline after October, which was consistent with the time distribution of JE incidence. Conclusion Guiping city has a high density of mosquitoes. Cx. tritaeniorhynchus is the dominant species of JE vector. The density dynamics of mosquitoes were closely correlated with the incidence of JE. Hence, the prevention and control of mosquitoes such as Cx. tritaeniorhynchus should be strengthend.

Key words: Vector mosquito, Japanese encephalitis, Correlation