Evidence map›Paper›PMID 26370361›Full record

ArticleMalaria journal2015

Rise of multiple insecticide resistance in Anopheles funestus in Malawi: a major concern for malaria vector control.

Jacob M Riveron, Martin Chiumia, Benjamin D Menze, Kayla G Barnes, Helen Irving, Sulaiman S Ibrahim, Gareth D Weedall, Themba Mzilahowa, Charles S Wondji

Open access · goldAbstract read
In one paragraph

Article in Malaria journal, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 84 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
84citing papers in PubMed, 2 pooled it
11.9field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

84 citing papers in PubMed, 2 syntheses or guidelines pooled it, 141 citations in OpenAlex.

  1. Pooled it
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  8. Spatial Heterogeneity ofJournal of parasitology research · 2026
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24 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors at 2 institutions in 3 countries.

Jacob M RiveronVector Biology Department, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, UK. jacob.riveron@lstmed.ac.uk.
Martin ChiumiaMalaria Alert Centre, College of Medicine, University of Malawi, Blantyre, Malawi. mchiumia@mac.medcol.mw.
Benjamin D MenzeVector Biology Department, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, UK. mbenji2@yahoo.fr.
Kayla G BarnesVector Biology Department, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, UK. K.G.Barnes@liverpool.ac.uk.
Helen IrvingVector Biology Department, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, UK. helen.irving@lstmed.ac.uk.
Sulaiman S IbrahimVector Biology Department, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, UK. sssadi79@liverpool.ac.uk.
Gareth D WeedallVector Biology Department, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, UK. Gareth.Weedall@lstmed.ac.uk.
Themba MzilahowaMalaria Alert Centre, College of Medicine, University of Malawi, Blantyre, Malawi. tmzilahowa@mac.medcol.mw.
Charles S WondjiVector Biology Department, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, UK. charles.wondji@lstmed.ac.uk.
Liverpool School of Tropical Medicine · GBUniversity of Malawi · MW

Funding

Wellcome TrustWellcome Trust WT101893MA
6 · The paper itself

Abstract

backgroundDeciphering the dynamics and evolution of insecticide resistance in malaria vectors is crucial for successful vector control. This study reports an increase of resistance intensity and a rise of multiple insecticide resistance in Anopheles funestus in Malawi leading to reduced bed net efficacy.

methodsAnopheles funestus group mosquitoes were collected in southern Malawi and the species composition, Plasmodium infection rate, susceptibility to insecticides and molecular bases of the resistance were analysed.

resultsMosquito collection revealed a predominance of An. funestus group mosquitoes with a high hybrid rate (12.2 %) suggesting extensive species hybridization. An. funestus sensu stricto was the main Plasmodium vector (4.8 % infection). Consistently high levels of resistance to pyrethroid and carbamate insecticides were recorded and had increased between 2009 and 2014. Furthermore, the 2014 collection exhibited multiple insecticide resistance, notably to DDT, contrary to 2009. Increased pyrethroid resistance correlates with reduced efficacy of bed nets (<5 % mortality by Olyset(®) net), which can compromise control efforts. This change in resistance dynamics is mirrored by prevalent resistance mechanisms, firstly with increased over-expression of key pyrethroid resistance genes (CYP6Pa/b and CYP6M7) in 2014 and secondly, detection of the A296S-RDL dieldrin resistance mutation for the first time. However, the L119F-GSTe2 and kdr mutations were absent.

conclusionsSuch increased resistance levels and rise of multiple resistance highlight the need to rapidly implement resistance management strategies to preserve the effectiveness of existing insecticide-based control interventions.

Indexed as

AnimalsAnophelesFemaleInsecticide ResistanceInsecticidesInsect VectorsMalariaMalawiMaleMosquito ControlMutationInsecticides

Identifiers

PMID26370361
PMCPMC4570681
OpenAlexW1840107086

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.