Proceedings of the Royal Society of London. Series B, Biological Sciences (2019) 286 (1907 - 20191091)

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Vasileia Balabanidou, Mary Kefi, Michalis Aivaliotis, Venetia Koidou, Juan R. Girotti, Sergio J. Mijailovsky, M. Patricia Juárez, Eva Papadogiorgaki, George Chalepakis, Anastasia Kampouraki, Christoforos Nikolaou, Hilary Ranson and John Vontas (2019)
Mosquitoes cloak their legs to resist insecticides
Proceedings of the Royal Society of London. Series B, Biological Sciences 286 (1907 - 20191091)
Abstract: Malaria incidence has halved since the year 2000, with 80% of the reduction attributable to the use of insecticides. However, insecticide resistance is now widespread, is rapidly increasing in spectrum and intensity across Africa, and may be contributing to the increase of malaria incidence in 2018. The role of detoxification enzymes and target site mutations has been documented in the major malaria vector Anopheles gambiae; however, the emergence of striking resistant phenotypes suggests the occurrence of additional mechanisms. By comparing legs, the most relevant insect tissue for insecticide uptake, we show that resistant mosquitoes largely remodel their leg cuticles via enhanced deposition of cuticular proteins and chitin, corroborating a leg-thickening phenotype. Moreover, we show that resistant female mosquitoes seal their leg cuticles with higher total and different relative amounts of cuticular hydrocarbons, compared with susceptible ones. The structural and functional alterations in Anopheles female mosquito legs are associated with a reduced uptake of insecticides, substantially contributing to the resistance phenotype.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
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Database assignments for author(s): John Vontas

Research topic(s) for pests/diseases/weeds:
pesticide resistance of pest

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.
Anopheles gambiae Burkina Faso
Anopheles gambiae Cameroon