| Literature DB >> 12685640 |
José Bento Pereira Lima1, Marcella Pereira Da-Cunha, Ronaldo Carneiro Júnior Da Silva, Allan Kardec Ribeiro Galardo, Sidinei da Silva Soares, Ima Aparecida Braga, Ricardo Pimentel Ramos, Denise Valle.
Abstract
Chemical insecticides have been widely used in Brazil for several years. This exposes mosquito populations to an intense selection pressure for resistance to insecticides. In 1999, the Brazilian National Health Foundation started the first program designed to monitor the resistance of Aedes aegypti to insecticides. We analyzed populations from 10 municipalities (from 84 selected in Brazil) in the states of Rio de Janeiro and Espírito Santo. Exposure of larvae to a diagnostic dose of temephos showed in alterations in susceptibility in all populations. Mosquitoes from eight municipalities exhibited resistance, with mortality levels ranging from 74% (Campos dos Goytacazes, Rio de Janeiro) to 23.5% (São Gonçalo, Rio de Janeiro). The resistance ratios of mosquitoes from three municipalities ranged from 3.59 to 12.41. Adults from only one municipality (Nova Iguaçu, Rio de Janeiro) remained susceptible to both fenitrothion and malathion. These results are being used to define new local vector control strategies.Entities:
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Year: 2003 PMID： 12685640
Source DB: PubMed Journal: Am J Trop Med Hyg ISSN： 0002-9637 Impact factor: 2.345