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Updated: Jul 28, 2026
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Maintaining Aedes aegypti Mosquitoes Infected with Wolbachia
Published on: August 14, 2017
High Wolbachia density in insecticide-resistant mosquitoes
Claire Berticat1, François Rousset, Michel Raymond
1Institut des Sciences de l'Evolution (UMR 5554), Laboratoire Génétique et Environnement, CC 065, Université de Montpellier II, 34095, Montpellier cedex 05, France.
Proceedings. Biological Sciences
|June 25, 2002
Summary
Insecticide resistance genes in Culex pipiens mosquitoes affect Wolbachia bacteria levels. Mosquitoes with resistance genes show higher Wolbachia density, suggesting impaired bacterial control due to physiological costs.
Area of Science:
- Vector biology
- Microbial symbiosis
- Insect genetics
Background:
- Wolbachia endosymbionts influence host reproduction in insects.
- The impact of host genetics on endosymbiont density is often hypothesized but infrequently demonstrated.
Purpose of the Study:
- To investigate the influence of insecticide resistance genes on Wolbachia density in Culex pipiens.
- To determine if this interaction is present in natural mosquito populations.
Main Methods:
- Real-time quantitative PCR (qPCR) was employed to quantify Wolbachia density.
- Comparison of Wolbachia levels in Culex pipiens strains with and without specific insecticide resistance genes.
Main Results:
- Wolbachia density was significantly altered by the presence of insecticide resistance genes.
- Mosquito strains carrying resistance genes exhibited higher Wolbachia infection levels compared to susceptible strains.
- This interaction was observed in both laboratory and natural populations.
Conclusions:
- Insecticide resistance genes in Culex pipiens impact Wolbachia endosymbiont density.
- Mosquitoes with insecticide resistance genes may have a reduced capacity to regulate Wolbachia levels, potentially linked to physiological costs of resistance.
