[Epidemic situation and control strategy of malaria in Yancheng City, Jiangsu Province].

Objective To understand the epidemiological characteristics and epidemic situation of malaria in Yancheng City,so as to provide the evidence for proposing the control strategy of malaria.Methods A retrospective investigation was employed.The epidemiological data of the definitely diagnosed malaria cases in Yancheng City from 2003 to 2011 were collected and analyzed for the epidemiological characteristics and epidemic situation of malaria.Results A total of 134 malaria cases were detected in 9 counties(cities,districts) of Yancheng City from 1993 to 2011,including 18 cases of local vivax malaria,59 cases of imported vivax malaria,56 cases of imported falciparum malaria and 1 cases of imported malariae malaria,which comprised 13.43%,44.03%,41.79% and 0.75% of the total cases,respectively.From 1993 to 2011,the total incidence of malaria was 0.3 per million to 2.9 per million,and the incidence of local malaria ranged between 0 and 0.6 per million,appearing low epidemic situation.Since 2006,no local malaria cases were detected for 6 successive years.A total of 56 cases of oversea imported falciparum malaria and 1 cases of imported malariae malaria were found from 2007 to 2011,and the number of imported falciparum malaria cases exhibited an increasing tendency year by year.The median interval from onset to treatment for these patients was 1 day,58.96% of the patients went to clinic when they felt silk and the village clinic was their major choice for the first visit.All of the median intervals from onset to blood test,to diagnosis and to treatment were 4 days.Conclusions The transmission of local malaria tends to be gradually eliminated in Yancheng City,and the oversea imported falciparum malaria cases obviously increase.Currently,the surveillance and control of imported malaria should be given a high priority.