Skip directly to search Skip directly to A to Z list Skip directly to site content
CDC Home

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 4

Experimental hut results of lambdacyalothrin (insecticide)-treated nets (ITNs) and indoor residual spraying (IRS) against Culex quinquefasciatus, Ladji (pyrethroid resistance) field station*

ResultsTreatments
ITNs
IRS
Untreated netLambdacyhalothrin 18 mg/m2Unsprayed hutLambdacyhalothrin 30 mg/m2
Total entered845598858769
Deterred, %_29.2_10.4
Exiting, % (CI)29.8 (26.7–32.9)35.9 (32.1–39.8)52.7 (49.3–56.0)54.6 (51.1–58.1)
Blood-fed, % (CI)62.8 (59.6–56.1)59.5 (55.6–63.5)85.1 (82.7–87.5)42.9 (39.4–46.4)
Blood-feeding inhibitionNS49.6
Personal protection, % (no. blood-fed– (531)33.1 (355)– (730)54.8 (330)
Dead, % (CI)4.3 (2.9–5.6)8.5 (6.3–10.8)3.4 (2.2–4.6)16.3 (13.7–18.9)
Insecticidal effect, % (no. dead)– (36)1.9 (51)– (29)11.6 (125)

*CI, 95% confidence interval.

Main Article

Top of Page

USA.gov: The U.S. Government's Official Web PortalDepartment of Health and Human Services
Centers for Disease Control and Prevention   1600 Clifton Rd. Atlanta, GA 30333, USA
800-CDC-INFO (800-232-4636) TTY: (888) 232-6348 - Contact CDC–INFO