Mandeng, SE, Awono-Ambene, HP, Bigoga, JD, Ekoko, WE, Binyang, J, Piameu, M, Mbakop, LR, Fesuh, BN, Mvondo, N, Tabue, R, Nwane, P, Mimpfoundi, R, Toto, JC, Kleinschmidt, I, Knox, TB, Mnzava, AP, Donnelly, MJ, Fondjo, E and Etang, J. 2019. Spatial and temporal development of deltamethrin resistance in malaria vectors of the Anopheles gambiae complex from North Cameroon. [Online]. PLOS One. Available from: https://doi.org/10.1371/journal.pone.0212024
Mandeng, SE, Awono-Ambene, HP, Bigoga, JD, Ekoko, WE, Binyang, J, Piameu, M, Mbakop, LR, Fesuh, BN, Mvondo, N, Tabue, R, Nwane, P, Mimpfoundi, R, Toto, JC, Kleinschmidt, I, Knox, TB, Mnzava, AP, Donnelly, MJ, Fondjo, E and Etang, J. Spatial and temporal development of deltamethrin resistance in malaria vectors of the Anopheles gambiae complex from North Cameroon [Internet]. PLOS One; 2019. Available from: https://doi.org/10.1371/journal.pone.0212024
Mandeng, SE, Awono-Ambene, HP, Bigoga, JD, Ekoko, WE, Binyang, J, Piameu, M, Mbakop, LR, Fesuh, BN, Mvondo, N, Tabue, R, Nwane, P, Mimpfoundi, R, Toto, JC, Kleinschmidt, I, Knox, TB, Mnzava, AP, Donnelly, MJ, Fondjo, E and Etang, J (2019). Spatial and temporal development of deltamethrin resistance in malaria vectors of the Anopheles gambiae complex from North Cameroon. [Data Collection]. PLOS One. https://doi.org/10.1371/journal.pone.0212024
Description
The effectiveness of insecticide-based malaria vector control interventions in Africa is threatened by the spread and intensification of pyrethroid resistance in targeted mosquito populations. The present study aimed at investigating the temporal and spatial dynamics of deltamethrin resistance in An. gambiae s.l. populations from North Cameroon. Mosquito larvae were collected from 24 settings of the Garoua, Pitoa and Mayo Oulo Health Districts (HDs) from 2011 to 2015. Two to five days old female An. gambiae s.l. emerging from larval collections were tested for deltamethrin resistance using the World Health Organization’s (WHO) standard protocol. Sub samples of test mosquitoes were identified to species using PCR-RFLP and genotyped for knockdown resistance alleles (Kdr 1014F and 1014S) using Hot Ligation Oligonucleotide Assay (HOLA). All the tested mosquitoes were identified as belonging to the An. gambiae complex, including 3 sibling species mostly represented by Anopheles arabiensis (67.6%), followed by Anopheles coluzzii (25.4%) and Anopheles gambiae (7%). Deltamethrin resistance frequencies increased significantly between 2011 and 2015, with mosquito mortality rates declining from 70–85% to 49–73% in the three HDs (Jonckheere-Terstra test statistic (JT) = 5638, P< 0.001), although a temporary increase of mortality rates (91–97%) was seen in the Pitoa and Mayo Oulo HDs in 2012. Overall, confirmed resistance emerged in 10 An. gambiae s.l. populations over the 24 field populations monitored during the study period, from 2011 to 2015. Phenotypic resistance was mostly found in urban settings compared with semi-urban and rural settings (JT = 5282, P< 0.0001), with a spatial autocorrelation between neighboring localities. The Kdr 1014F allelic frequencies in study HDs increased from 0–30% in 2011 to 18–61% in 2014–2015 (JT = 620, P <0.001), especially in An. coluzzii samples. The overall frequency of the Kdr 1014S allele was 0.1%. This study revealed a rapid increase and widespread deltamethrin resistance frequency as well as Kdr 1014F allelic frequencies in An. gambiae s.l. populations over time, emphasizing the urgent need for vector surveillance and insecticide resistance management strategies in Cameroon.
| Data capture method | Experiment |
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| Date (Date published in a 3rd party system) | 19 February 2019 |
| Language(s) of written materials | English |
| Data Creators | Mandeng, SE, Awono-Ambene, HP, Bigoga, JD, Ekoko, WE, Binyang, J, Piameu, M, Mbakop, LR, Fesuh, BN, Mvondo, N, Tabue, R, Nwane, P, Mimpfoundi, R, Toto, JC, Kleinschmidt, I, Knox, TB, Mnzava, AP, Donnelly, MJ, Fondjo, E and Etang, J |
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| LSHTM Faculty/Department | Faculty of Epidemiology and Population Health > Dept of Infectious Disease Epidemiology |
| Participating Institutions | London School of Hygiene & Tropical Medicine |
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| Date Deposited | 30 Aug 2019 10:15 |
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| Last Modified | 30 Aug 2019 10:15 |
| Publisher | PLOS One |
