ArticleParasites & vectors2020
Evaluation of resistance to pyrethroid and organophosphate adulticides and kdr genotyping in Aedes aegypti populations from Roraima, the northernmost Brazilian State.
Article in Parasites & vectors, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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Who cites it
9 citing papers in PubMed, 18 citations in OpenAlex.
- Insecticide resistance levels, spatial distribution, and kdr mutations in the dengue vector Aedes albopictus of Hong Kong.PLoS neglected tropical diseases · 2025Article
- Pyrethroid resistance in Aedes aegypti: genetic mechanisms worldwide, and recommendations for effective vector control.Parasites & vectors · 2025Review
- First large-scale assessment of pyrethroid resistance in Anopheles darlingi (Diptera: Culicidae) in Brazil (2021-2024): a crucial step in informing decision-making in malaria control.Malaria journal · 2025Article
- Susceptibility of Aedes aegypti to spinosad larvicide and space spray adulticides in Brazil.Memorias do Instituto Oswaldo Cruz · 2025Article
- Assessing pyrethroid resistance in Aedes aegypti from Cordoba Colombia: Implications of kdr mutations.PloS one · 2024Article
- Insecticide resistance compromises the control of Aedes aegypti in Bangladesh.Pest management science · 2023Article
- Evolution of knockdown resistance (Frontiers in cellular and infection microbiology · 2023Article
- Review
- Large-Scale Deployment and Establishment ofFrontiers in microbiology · 2021Article
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Authors and funding
6 authors at 4 institutions in 1 country.
Funding
Abstract
backgroundRoraima, the northernmost State in Brazil, borders Venezuela and Guyana. Although mostly covered by the tropical forests, the urban centers of this state are highly infested with Ae. aegypti and are endemic for dengue, Zika and chikungunya. We accessed the insecticide resistance status of Ae. aegypti populations from the capital Boa Vista, two cities on international borders (Pacaraima and Bonfim) and Rorainópolis bordering Amazonas State, in order to evaluate the chemical control efficacy in these localities.
methodsTests with World Health Organization (WHO)-like tubes impregnated with the pyrethroid deltamethrin (0.05% and 0.12%) and the organophosphate malathion (0.7%) were conducted with Ae. aegypti from Boa Vista, Pacaraima, Bonfim and Rorainópolis, collected in 2016 and 2018. Genotyping of kdr mutations, related to resistance to pyrethroids, was performed for the SNP variations at sites 1016 and 1534 of the voltage gated sodium channel gene (Na
resultsAedes albopictus was absent in our collections, and therefore only Ae. aegypti was tested. All Ae. aegypti populations were susceptible to 0.7% malathion in 2016; however, mortality dropped to under 90% in Bonfim and Pacaraima populations in 2018. All populations were resistant to 0.05% deltamethrin in both years. The time that 50% of females suffered knockdown (KdT
conclusionsThese results are important for the knowledge about insecticide resistance status of Ae. aegypti populations from Roraima and will help improve vector control strategies that may be applied to diverse localities under similar geographical and urban conditions.
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