Evidence map›Paper›PMID 26980461›Full record

ArticleMalaria journal2016

Does insecticide resistance contribute to heterogeneities in malaria transmission in The Gambia?

Kevin Ochieng' Opondo, David Weetman, Musa Jawara, Mathurin Diatta, Amfaal Fofana, Florence Crombe, Julia Mwesigwa, Umberto D'Alessandro, Martin James Donnelly

Abstract read
In one paragraph

Article in Malaria journal, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

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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

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3 · Its place in the literature

Who cites it

22 citing papers in PubMed.

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  7. Evolution of thePathogens (Basel, Switzerland) · 2022
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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.

Kevin Ochieng' OpondoMedical Research Council Unit, PO Box 273, Banjul, The Gambia.
David WeetmanDepartment of Vector Biology, Liverpool School of Tropical Medicine, Liverpool, UK.
Musa JawaraMedical Research Council Unit, PO Box 273, Banjul, The Gambia.
Mathurin DiattaMedical Research Council Unit, PO Box 273, Banjul, The Gambia.
Amfaal FofanaMedical Research Council Unit, PO Box 273, Banjul, The Gambia.
Florence CrombeDepartment of Vector Biology, Liverpool School of Tropical Medicine, Liverpool, UK.
Julia MwesigwaMedical Research Council Unit, PO Box 273, Banjul, The Gambia.
Umberto D'AlessandroMedical Research Council Unit, PO Box 273, Banjul, The Gambia.
Martin James DonnellyDepartment of Vector Biology, Liverpool School of Tropical Medicine, Liverpool, UK. Martin.Donnelly@lstmed.ac.uk.ORCID http://orcid.org/0000-0001-5218-1497

Funding

Medical Research Council MC_EX_MR/J002364/1
6 · The paper itself

Abstract

backgroundMalaria hotspots, areas with consistently higher than average transmission, may become increasingly common as malaria declines. This phenomenon, currently observed in The Gambia, may be caused by several factors, including some related to the local vectors, whose contribution is poorly understood.

methodsUsing WHO susceptibility bioassays, insecticide resistance status was determined in vector populations sampled from six pairs of villages across The Gambia, each pair contained a low and high prevalence village.

resultsThree vector species were observed (23.5% Anopheles arabiensis, 31.2% Anopheles gambiae, 43.3% Anopheles coluzzii and 2.0% An. coluzzii × An. gambiae hybrids). Even at a fine scale, significant differences in species composition were detected within village pairs. Resistance to both DDT and deltamethrin was more common in An. gambiae, most markedly in the eastern part of The Gambia and partly attributable to differing frequencies of resistance mutations. The Vgsc-1014F target site mutation was strongly associated with both DDT (OR = 256.7, (95% CI 48.6-6374.3, p < 0.001) and deltamethrin survival (OR = 9.14, (95% CI 4.24-21.4, p < 0.001). A second target site mutation, Vgsc-1575Y, which co-occurs with Vgsc-1014F, and a metabolic marker of resistance, Gste2-114T, conferred additional survival benefits to both insecticides. DDT resistance occurred significantly more frequently in villages with high malaria prevalence (p = 0.025) though this did not apply to deltamethrin resistance.

conclusionWhilst causality of relationships requires further investigation, variation in vector species and insecticide resistance in The Gambia is associated with malaria endemicity; with a notably higher prevalence of infection and insecticide resistance in the east of the country. In areas with heterogeneous malaria transmission, the role of the vector should be investigated to guide malaria control interventions.

Indexed as

Insecticide ResistanceAnimalsAnophelesBiological AssayCross-Sectional StudiesFemaleGambiaMalariaSurvival Analysis

Identifiers

PMID26980461
PMCPMC4793517

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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.