Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/143463
Title: Mosquitoes as a feasible sentinel group for anti-malarial resistance surveillance by Next Generation Sequencing of Plasmodium falciparum
Author: Smith Aguasca, Rebecca
Gupta, Himanshu
Uberegui, Estefania
Maquina, Mara
Saute, Francisco
Paaijmans, Krijn P.
Mayor Aparicio, Alfredo Gabriel
Huijben, Silvie
Keywords: Malària
Mosquits
Malaria
Mosquitoes
Issue Date: 17-Oct-2019
Publisher: BioMed Central
Abstract: Background: Plasmodium falciparum drug resistance surveillance is key to successful disease control and eradication. Contemporary methods that only allow determination of prevalence of resistance are expensive, time consuming and require ethical considerations. A newer method involving Next Generation Sequencing (NGS) permits obtaining frequency of resistance while allowing to detect minority variants in mixed infections. Here, NGS was tested for P. falciparum resistance marker detection in mosquito samples as a feasible and suitable alternative for molecular resistance surveillance. Anopheles funestus were collected in southern Mozambique using CDC light traps and manual collec‑ tions. DNA was extracted from either whole mosquito, head-thorax and abdomen separately or pools of fve mosqui‑ toes. These samples were screened for P. falciparum and if positive for k13, pfcrt, pfmdr1, pfdhps and pfdhfr mutations related to anti-malarial drug resistance with Sanger sequencing and NGS. Results: Among the 846 samples screened for P. falciparum, 122 were positive by 18S ssrDNA qPCR with an infection rate of 23.6%. No mutations were observed for k13 and pfcrt72-76 and almost zero for pfmdr86, but quintuple pfdhfr/ pfdhps mutations were near fxation and about half of the isolates contained the pfmdr184F polymorphism. Similar allele frequencies of resistance markers were estimated with NGS in comparison with the prevalence of markers obtained with the gold standard Sanger sequencing. Conclusions: Pooled deep sequencing of P. falciparum isolates extracted from mosquitoes is a promising, efcient and cost-efective method to quantify allele frequencies at population level which allows to detect known and unknown markers of resistance in single and mixed infections in a timelier manner. Using mosquitoes as sentinel group and focusing on allele frequency opposed to prevalence, permits active surveillance across a more homogene‑ ous geographical range.
Note: Reproducció del document publicat a: http://dx.doi.org/10.1186/s12936-019-2946-0
It is part of: Malaria Journal, 2019, vol. 18
URI: http://hdl.handle.net/2445/143463
Related resource: http://dx.doi.org/10.1186/s12936-019-2946-0
ISSN: 1475-2875
Appears in Collections:Articles publicats en revistes (ISGlobal)

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