Seasonal increase and decrease of malaria vector in monitoring sites of Jiangsu Province in 2005-2010

Objective To understand the changes of population density,seasonal variations of malaria vector in monitoring sites of Jiangsu and provide scientific basis for malaria control.Methods In 2005-2010,5 towns in Jiangsu Province were selected as malaria vector monitoring sites and outdoor semi-overnight trapping with human baits and indoor(in bed net)capture in early morning were used to capture anopheline mosquitoes.Then monthly malaria incidence in the last 6 years was statistically calculated by using circular distribution method.Results Only Anopheles sinensis were captured in five monitoring sites.The highest density of Anopheles sinensis appeared in first half of July.And peak malaria infection was in August 16.The distribution of malaria cases was consistent with seasonal fluctuation of vector density.Conclusions The monitoring of malaria vector be strengthened to control the increase of mosquito density and malaria infection.