Reduced efficacy of pyrethroid space sprays for dengue control in an area of Martinique with pyrethroid resistance
Autor(es): Marcombe Sébastien,Carron Alexandre,Darriet Frédéric,Etienne Manuel,Agnew Philip,Tolosa Michel,Yp-Tcha Marie Michèle,Lagneau Christophe,Yébakima André,Corbel Vincent
Resumo: In the Caribbean, insecticide resistance is widely developed in Aedes aegypti and represents a serious obstacle for dengue vector control. The efficacy of pyrethroid and organophosphate ultra-low volume space sprays was investigated in Martinique where Ae. aegypti has been shown to be resistant to conventional insecticides. In the laboratory, a wild-field caught population showed high levels of resistance to deltamethrin, organophosphate (naled), and pyrethrum. Simulated-field trials showed that this resistance can strongly reduce the knock-down effect and mortality of deltamethrin and synergized pyrethrins when applied by thermal-fogging. Conversely, the efficacy of naled was high against insecticide-resistant mosquitoes. Chemical analyses of nettings exposed to the treatments showed a decrease in residues over distance from release for the pyrethroids, and naled was not detected. This finding has important implications for dengue vector control and emphasizes the need to develop innovative strategies to maintain effective control of resistant Ae. aegypti populations.
Imprenta: The American Journal of Tropical Medicine and Hygiene, v. 80, n. 5, p. 745-751, 2009
Identificador do objeto digital: 10.4269/ajtmh.2009.80.745
Descritores: Aedes aegypti - Viral infections ; Aedes aegypti - Dengue ; Aedes aegypti - Epidemiology ; Aedes aegypti - Public health
Data de publicação: 2009
