关键词: 登革热, 媒介, 控制

Abstract: Objective To grasp the status of the geographical distribution,the breeding habit and the seasonal fluctuation of the dengue fever vector,so as to provide scientific basis for the reasonable use of public health resources and make the measure to prevent and control the occurrence or prevalence of dengue fever in the district where Aedes aegypti mainly appeared.Methods To investigate the breeding place of the dengue fever vector in the 1522 villages(resident committee) of the whole city by a cluster random sampling method,and to understand its geographical distribution,the seasonal fluctuation and its density by the breeding sites survey of mosquito larvae.Compare to the former surveillance data,know its geographical distribution,migration and the seasonal fluctuation.In the six villages and towns where the density of Ae.aegypti was higher,we adopted the "Danzhou Pattern" including "Community participation,Health education and Environment restriction" to do the vector control work that put the emphasis on the elimination of breeding places.Results(1) Ae.albopictus distributed all the investigated villages and towns,street offices and farms,which positive rate was 100%.The positive rate in the natural villages(residents' committee) was 87.84%.Ae.aegypti distributed in the sixteen villages and towns and two farms,which positive rate was 54.54%.And the positive rate in the natural villages was 32.46%.(2) There was Ae.aegypti larvae in the whole year.Its density was in the peak from May to November,and began to drop in December.The density was in the lower level from December to March of the next year,and began to rise in April.(3) When the Breteau Index(BI) of Ae.aegypti decreased from 52.5 to 34.4,suggested that the control effect was good.There was significant difference between them(χ²=832.18,P<0.005).Conclusion There were still many natural environments contributed to the prevalence of dengue fever in Haikou.The control of vectors could efficiently reduce mosquito density and prevent the spread of dengue fever.Moreover,it was significant for the reasonable use of public health resource and the prevention and control of dengue fever through the investigation of vector distribution.