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Analyses of Insecticide Resistance Genes in and Mosquito Populations from Cameroon. | LitMetric
The emergence of insecticide resistance in could pose major challenges for arboviral-borne disease control. In this paper, insecticide susceptibility level and resistance mechanisms were assessed in (Linnaeus, 1762) and (Skuse, 1894) from urban settings of Cameroon. The F1 progeny of and collected in Douala, Yaoundé and Dschang from August to December 2020 was tested using WHO tube assays with four insecticides: deltamethrin 0.05%, permethrin 0.75%, DDT 4% and bendiocarb 0.1%. TaqMan, qPCR and RT-qPCR assays were used to detect kdr mutations and the expression profiles of eight detoxification genes. mosquitoes from Douala were found to be resistant to DDT, permethrin and deltamethrin. Three kdr mutations, F1534C, V1016G and V1016I were detected in populations from Douala and Dschang. The kdr allele F1534C was predominant (90%) in and was detected for the first time in (2.08%). P450s genes, Cyp9J28 (2.23-7.03 folds), Cyp9M6 (1.49-2.59 folds), Cyp9J32 (1.29-3.75 folds) and GSTD4 (1.34-55.3 folds) were found overexpressed in the Douala and Yaoundé populations. The emergence of insecticide resistance in and calls for alternative strategies towards the control and prevention of arboviral vector-borne diseases in Cameroon.
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