Analysis on malaria surveillance in Anopheles anthropophagus remaining distribution zone of Huanjiang Maonan Autonomous County during 2000-2014
Objective To analyze the epidemic of malaria and evaluate the result of malaria control in Huanjiang Maonan Autonomous County from 2000 to 2014,so as to provide scientific basis for drawing up and adjusting effective malaria control at the late-stage of malaria control.Methods The data of malaria reporting system,malaria surveillance and anopheles vector monitoring from 2000 to 2014 were collected and analyzed with descriptive epidemiology method.The malaria antibody in serum was examined in local residents with indirect immunofluorescence assay (IFA).Results A total of 217 524,7 182,1 702 and 7 730 slides in local residents,focus residents,febrile patients of mobile population and no fever cases of mobile population was examined.The average positive rates of blood examination were 0.02%,0.03%,1.71% and 0,respectively.A total of 69 malaria cases were reported,including 40 local malaria cases and 29 imported cases.There were no local malaria cases from 2006 to 2014.A total of 43 387 adult anopheles was captured within the 15 years of surveillance.An.sinensis was the predominant mosquito species accounting for 98.06% (42 545/43 387) and An.antropophagus accounted for 0.65% (282/43 387).There was no An.antropophagus found since 2010.The positive rate of IFA in focus residents was 0.13%(2/1 488).Conclusion There were no indigenous malaria cases and secondary cases since 2006 and no An.antropophagus was captured during 2010-2014.The imported malaria case from oversea is dominated in Huanjiang County.In order to achieve the goal of malaria elimination in Huanjiang County on schedule,it needs to strengthen monitoring,diagnosis,and treatment of imported malaria case among overseas workers from the malaria prevalent areas in Africa and southeast Asian countries.