[Establishment of malaria early warning system in Jiangsu Province Ⅷ Malaria vector monitoring in Jiangsu Province].

OBJECTIVE

To understand the population, density, seasonal fluctuation and nocturnal pattern of malaria vectors in Jiangsu Province, thus to provide evidences for malaria elimination in this province.

METHODS

Seven counties (cities, districts) were selected as the monitoring sites for malaria vectors in Jiangsu Province from 2013 to 2015. The mosquitoes were captured by human bait trapping in bed nets and mosquito-lured lamp overnight, and the seasonal fluctuation and nocturnal pattern of malaria vectors were observed.

RESULTS

A total of 11 041 mosquitoes were captured by the mosquito-lured lamps in 7 counties of Jiangsu Province from 2013 to 2015, and no was found. Among all the 7 monitoring sites, the number of captured in Sihong County was the most (6 742 mosquitoes), while that in Xuyu County was the least (34 mosquitoes). During this period, the density peaks of were the first half of July, the first half of August and the second half of July. A total of 2 421 were collected in 7 monitoring sites from 2013 to 2015 by human bait trapping in bed nets overnight. Among all the 7 monitoring sites, the captured number of in Sihong County was the most (1 085 mosquitoes), while that in Ganyu County was the least (13 mosquitoes). The nocturnal peak of was from 19：00 to 20：00 and 525 mosquitoes were captured during this period of time, which accounted for 21.68% of the total. Hereafter, the captured number of reduced over time.

CONCLUSIONS

The density of mosquitoes is still high in individual areas in Jiangsu Province, so the epidemic and vector monitoring still should be strengthened to prevent the local transmission of imported malaria.