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Malaria Journal
Published in: Malaria Journal 1/2010

Open Access 01-12-2010 | Research

Field efficacy of a new mosaic long-lasting mosquito net (PermaNet® 3.0) against pyrethroid-resistant malaria vectors: a multi centre study in Western and Central Africa

Authors: Vincent Corbel, Joseph Chabi, Roch K Dabiré, Josiane Etang, Philippe Nwane, Olivier Pigeon, Martin Akogbeto, Jean-Marc Hougard

Published in: Malaria Journal | Issue 1/2010

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Abstract

Background

Due to the spread of pyrethroid-resistance in malaria vectors in Africa, new strategies and tools are urgently needed to better control malaria transmission. The aim of this study was to evaluate the performances of a new mosaic long-lasting insecticidal net (LLIN), i.e. PermaNet® 3.0, against wild pyrethroid-resistant Anopheles gambiae s.l. in West and Central Africa.

Methods

A multi centre experimental hut trial was conducted in Malanville (Benin), Vallée du Kou (Burkina Faso) and Pitoa (Cameroon) to investigate the exophily, blood feeding inhibition and mortality induced by PermaNet® 3.0 (i.e. a mosaic net containing piperonyl butoxide and deltamethrin on the roof) comparatively to the WHO recommended PermaNet® 2.0 (unwashed and washed 20-times) and a conventionally deltamethrin-treated net (CTN).

Results

The personal protection and insecticidal activity of PermaNet 3.0 and PermaNet® 2.0 were excellent (>80%) in the "pyrethroid-tolerant" area of Malanville. In the pyrethroid-resistance areas of Pitoa (metabolic resistance) and Vallée du Kou (presence of the L1014F kdr mutation), PermaNet® 3.0 showed equal or better performances than PermaNet® 2.0. It should be noted however that the deltamethrin content on PermaNet® 3.0 was up to twice higher than that of PermaNet® 2.0. Significant reduction of efficacy of both LLIN was noted after 20 washes although PermaNet® 3.0 still fulfilled the WHO requirement for LLIN.

Conclusion

The use of combination nets for malaria control offers promising prospects. However, further investigations are needed to demonstrate the benefits of using PermaNet® 3.0 for the control of pyrethroid resistant mosquito populations in Africa.
Appendix
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Metadata
Title
Field efficacy of a new mosaic long-lasting mosquito net (PermaNet® 3.0) against pyrethroid-resistant malaria vectors: a multi centre study in Western and Central Africa
Authors
Vincent Corbel
Joseph Chabi
Roch K Dabiré
Josiane Etang
Philippe Nwane
Olivier Pigeon
Martin Akogbeto
Jean-Marc Hougard
Publication date
01-12-2010
Publisher
BioMed Central
Published in
Malaria Journal / Issue 1/2010
Electronic ISSN: 1475-2875
DOI
https://doi.org/10.1186/1475-2875-9-113

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