Survey on the Current Dangerous Degree of Dengue Spreading in Minhang District

Objective To provide scientific basis for prevention plan by finding out the probability of Dengue emerging and spreading in Minhang District. Methods To collect the Aedes albopictus series on spot by using method from WHO,and make survey on larvae by immersing and adults by Aedes-luring. Results No Aedes aegypti has been discovered in Minhang District. Aedes albopictus larvae appeared in April,and the larvae peak was in June-September, during which Aedes albopictus indexes reached Grade 3 of WHO Spreading Grades and reach Grade 5 in August. The biting rate of Aedes albopictus peaked at 8:00 and 15:00 in July-September, showing phototaxis to a certain extent. The Aedes albopictus larvae distributed mainly in resident areas, parks, nurseries, and old tyre piles.Resistance of the A.albopictus larvae was 41.81 folds to DDV and none to pyrethroids. Conclusion A.albopictus is a vector of Dengue in Minhang District, and it has reached spreading grade.