ArticleParasites & vectors2025
Significant variations in tolerance to clothianidin and pirimiphos-methyl in Anopheles gambiae and Anopheles funestus populations during a dramatic malaria resurgence despite sustained indoor residual spraying in Uganda.
Article in Parasites & vectors, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- Comparative genomics of nicotinic acetylcholine receptors reveals early divergence of the α6 subunit in cryptic Anopheles species.BMC genomics · 2026Article
- Impact of indoor residual spraying and insecticide-treated nets on malaria burden in 8 districts in West Nile and Acholi regions, Uganda: a quasi-experimental study.BMC global and public health · 2026Article
- Anopheles coluzzii from Sakassou, Central Côte d'Ivoire show aggravated resistance to pyrethroids and organophosphate but are fully susceptible to clothianidin.Parasites & vectors · 2026Article
- Standing genetic variation underlies divergence of nicotinic acetylcholine receptor subunits among cryptic species of thebioRxiv : the preprint server for biology · 2025Article
- Malaria epidemics and its drivers in Uganda in 2022.Malaria journal · 2025Article
- Disentangling the roles of different vector species during a malaria resurgence in Eastern Uganda.PLOS global public health · 2025Article
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Abstract
backgroundA dramatic malaria resurgence occurred in areas of Uganda between 2020 and 2022, coinciding with the switch to clothianidin-based formulations for indoor residual spraying. During the resurgence, Anopheles funestus sensu lato (s.l.) numbers increased more than those of Anopheles gambiae s.l., but when an alternative insecticide, pirimiphos-methyl, was reintroduced in 2023, both malaria cases and An. funestus mosquito density fell.
methodsIn this study, we investigated possible causes of the resurgence by assessing (1) whether sufficient quantities of insecticide were sprayed, (2) the residual insecticide bio-efficacy against wild mosquitoes, and (3) the insecticide susceptibility of both key vector populations using standard test tube assays and wall cone assays.
resultsIn 2023, after adjusting for extraction efficiency, 70-80% of the houses had optimal residual concentrations of insecticides (clothianidin > 0.3g/m
conclusionsDespite the possible variations observed in spray operations, the study revealed that An. funestus s.l. exhibited a higher tolerance to clothianidin-based formulations compared to An. gambiae s.l., and this might have driven the malaria resurgence observed in Uganda. However, there are signals of An. gambiae s.l. resistance to pirimiphos-methyl, which will require further investigation and monitoring.
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