Analysis on the dengue fever and its vector control in Guangzhou city in recent years

Objective To analyze and evaluate four epidemics of dengue fever epidemics and their vector control in Guangzhou in recent years.Methods The epidemiological data of native cases were collected and analyzed.The density of Aedes albopictus was surveyed by Breteau index(BI),Ovitrap index,Standard Space index(SSI) and Biting rates.Results Four epidemics had 2 286 native cases,the first started in May,the last ended in December,the peak happened between August and October.There were forty epidemic focuses and lasted 614 days totally.After actively control,the density of Aedes albopictus larvae was declined remarkably.BI was declined from 11.99 in 2002 to 4.64 in 2007.But in high frequently season,the density of Aedes albopictus was still in a dangerous range.The fast-killing insecticide formula had been used through ULV spraying in epidemic focuses and the killing ratio reached 98.2%.The control lasting period in rural area,the village in city,community were 10.3,49.4,56.6 respectively(P0.01).Conclusion To control dengue fever,the main measure is killing mate Aedes mosquitoes timely,quickly,comprehensively,repeatedly,and assisted by eliminating and controlling the breeding places.The vector's surveillance should be strengthened and the control strategy and methods should be adjusted accordingly.