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Effect of Wolbachia on insecticide susceptibility in lines of Aedes aegypti

Published online by Cambridge University Press:  13 November 2012

N.M. Endersby  and
A.A. Hoffmann
N.M. Endersby*
Affiliation:
Department of Genetics, Bio21 Institute, The University of Melbourne, Victoria 3010, Australia
A.A. Hoffmann
Affiliation:
Department of Genetics, Bio21 Institute, The University of Melbourne, Victoria 3010, Australia
*
* Author for correspondence Fax: +61 3 8344 2279 E-mail: nancye@unimelb.edu.au
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Abstract

Two stable infections of Wolbachia pipientis, wMelPop and wMel, now established in Aedes aegypti, are being used in a biocontrol program to suppress the transmission of dengue. Any effects of Wolbachia infection on insecticide resistance of mosquitoes may undermine the success of this program. Bioassays of Ae. aegypti were conducted to test for differences in response to insecticides between Wolbachia infected (wMelPop, wMel) and uninfected lines. Insecticides screened were bifenthrin, the pyrethroid commonly used for adult knockdown, as well as larvicides: Bacillus thuringiensis var. israelensis, the organophosphate, temephos and the insect growth regulator, s-methoprene. While differences in response between lines were detected for some insecticides, no obvious or consistent effects related to presence of Wolbachia infection were observed. Spreading Wolbachia infections are, therefore, unlikely to affect the efficacy of traditional chemical control of mosquito outbreaks.

Keywords

Aedes aegyptWolbachiainsecticide resistancedengue
Type
Research Paper
Information
Bulletin of Entomological Research , Volume 103 , Issue 3 , June 2013 , pp. 269 - 277
Copyright
Copyright © Cambridge University Press 2012

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