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Volume 13, Number 2—February 2007

Research

Reduced Efficacy of Insecticide-treated Nets and Indoor Residual Spraying for Malaria Control in Pyrethroid Resistance Area, Benin

Raphael N’Guessan*, Vincent Corbel†, Martin Akogbéto‡§, and Mark RowlandComments to Author 
Author affiliations: *London School of Hygiene and Tropical Medicine, Cotonou, Benin, West Africa; †Institut de Recherche pour le Developpement, Montpellier, France; ‡University of Abomey-Calavi, Cotonou, Benin; §Centre de Recherche Entomologique, Cotonou, Benin¶London School of Hygiene and Tropical Medicine, London, United Kingdom;

Main Article

Table 1

Residual activity of lambdacyalothrin (insecticide)-treated nets (ITNs) and indoor residual spraying over 3 mo in experimental huts, Malanville and Ladji field stations*

When and where substrate testedITNs at 18 mg/m2
Indoor residual spraying at 30 mg/m2
Sides + top of net
Ceiling
Walls
No. tested% Corrected mortalityNo. tested% Corrected mortalityNo. tested% Corrected mortality
Wk 0






Malanville
77
100
33
100
60
100
Ladji
51
100
30
93.3
54
100
Wk 2
Ladji521002210041100
Wk 4
Ladji541002152.44742.5
Wk 6
Ladji571002580.04531.1
Wk 8
Malanville521002941.4542.6
Ladji4497.7825.03918.5

*As determined by using World Health Organization cone bioassays and susceptible Anopheles gambiae (Kisumu).

Main Article

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