Surveillance on dengue vector and breeding habit of veclor in Shanghai area

Objective To find out the population of Dengue vector and the rish degree of Dengue emergence and the breeding habit and distribution of vector in Shanghai area.The result was basis to provide guidance for Dengue control.Methods The larva collected from different area and container was identified for species and the positive rate of larva was checked. The man-alluring-biting method was used to survey the rate of biting during April-November,2001.Results (1)Aedes aegypti was not discovered in Shanghai,Aedes albopictus only.(2)Aedes albopictus larva was discovered during April-November;The Aedes albopictus larva density peak was in June-September.(3)During June-September,the Aedes albopictus container index (CI) was 8.59%; the house index (HI) was 8.90%; the Breteau index (BI) was 12.19%; the larval density index (LDI) was 2.16;The biting rate index (BRI) was 16.6 sets/per man power hour; The density of Aedes albopictus was equal to WHO three degree. It has risk for Dengue to spread.(4)The Aedes albopictus larva distribution was extensive,in tyre.,Jar.,Vat and the container from flower and from house.(5)The positive rate was different between the city and country,and between the different unity,area and house.Conclusion The Dengue vector is Aedes albopictus and its population has risk degree in Shanghai;The surveillance on population density and vector energy should be conducted every year.The control method for Dengue vector Aedes albopictus should be studied.