Avaliação da Bg-sentinel e da mosquitrap na captura do mosquito Aedes (Stegomyia) Aegypti (Linnaeus), (Diptera: culicidae)

Abstract

Dengue fever is a disease caused by virus infections. Dengue hemorrhagic fever is a more severe form that can be fatal. There is no vaccine against the disease, therefore, the main means of preventing dengue transmission is by stopping its vector. The aim of the present work was to evaluate new devices for entomological control. MosquiTRAP and BG-Sentinel trap were compared to oviposition trap trap and Nasci aspirator. The four sampling methods were simultaneously evaluated throughout 90 blocks of Serrano borough, Belo Horizonte (MG). The four methods were equidistantly set in every block. The three traps were installed in the house areas sheltered from the rain while the aspirator collected mosquitoes from areas surrounding houses and intra house areas. Oviposition trap and MosquiTRAP were checked every week, BG Sentinel® was checked during 24 hours every week, and the aspiration 15 minutes per week. Oviposition trap has proven to be the most sensitive method for mosquito detection during all the weeks of evaluation. The higher numbers of adult A. aegypti captured were observed in BG-Sentinel (275 females and 300 males). However, MosquiTRAP has captured a significantly higher number of females when compared to the other methods proving to be more female effective/specific (370) than male (21). Nasci aspirator captured less adults than the traps. Its higher capture percentage was (87%) in house areas. A meaningful correlation was observed between MosquiTRAP and oviposition trap (r=0,55) (p=0,001), suggesting an association between the two methods of capture. Physical factors such as temperature, humidity and rain did not influence the capture of A. aegypti (p>0,05). MosquiTRAP and BG-Sentinel have shown to be effective in capturing A. aegypti and can be used as methods to sample the population of the vector for monitoring and the population of adult mosquitoes in dengue fever control programs.