| Literature DB >> 16906249 |
Estelita Pereira Lima1, Alfredo Martins de Oliveira Filho, José Wellington de Oliveira Lima, Alberto Novaes Ramos Júnior, Luciano Pamplona de Góes Cavalcanti, Ricardo José Soares Pontes.
Abstract
The susceptibility of Aedes aegypti to temefos was evaluated by means of samples of eggs and larvae from four large counties in the state of Ceará (Fortaleza, Barbalha, Juazeiro do Norte and Crato). The technique standardized by the World Health Organization for tests with larvicides was used. The CL50 of eight samples from populations of Aedes was determined, as were their respective resistance ratios, compared to the CL50 of the susceptible Rockefeller strain. All populations submitted to the experiment showed resistance to temefos, with resistance ratios varying between 8 and 16. Analysis of these results reinforces prior evidence regarding the dissemination of temefos resistance in different locations in the state, subjected to considerable pressure for control in recent decades. The larvicide may lose its effectiveness if an urgent attempt is not made to reestablish the susceptibility of Aedes aegypti in these areas, profoundly affecting control campaigns currently under way.Entities:
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Year: 2006 PMID： 16906249 DOI： 10.1590/s0037-86822006000300006
Source DB: PubMed Journal: Rev Soc Bras Med Trop ISSN： 0037-8682 Impact factor: 1.581