Distribution of Aedes albopictus and its population density monitoring in Jiading District of Shanghai

ObjectiveTo ascertain the distribution and seasonal fluctuation of Aedes albopictus in Jiading, providing guidance for Dengue control.

MethodsPopulation density of Ae. albopictus larvae was surveyed by Breteau Index(BI) and Mosquito Ovitrap Index(MOI) method. Adult Ae. albopictus were monitored by carbon dioxide process and double layer mosquito net method.

ResultsThe peak of BI was from June to July. The highest BI was found at waste recycling station. The peak of MOI was in July and September. MOI was higher than BI, and the difference between the two was statistically significant (χ²=36.68, P < 0.01).The difference of the results in July and September was also statistically significant (χ²=12.39, 15.84, P < 0.01).The density of Aedes albopictus by carbon dioxide process had a peak in July while the peak by double layer mosquito net method was in August.

ConclusionWe should enhance density monitoring on Aedes albopictus.During the epidemic seasons, we should discover in time its increased density by objective, sensitive monitoring methods and control its density by multiple approaches, so as to effectively prevent and control imported cases.