Guillet Pierre, N'Guessan R., Darriet Frédéric, Traoré-Lamizana Moumouni, Chandre Fabrice, Carnevale Pierre. (2001). Combined pyrethroid and carbamate 'two-in-one' treated mosquito nets : field efficacy against pyrethroid-resistant Anopheles gambiae and Culex quinquefasciatus. Medical and Veterinary Entomology, 15 (1), p. 105-112. ISSN 0269-283X.
Titre du document
Combined pyrethroid and carbamate 'two-in-one' treated mosquito nets : field efficacy against pyrethroid-resistant Anopheles gambiae and Culex quinquefasciatus
Année de publication
2001
Type de document
Article
Auteurs
Guillet Pierre, N'Guessan R., Darriet Frédéric, Traoré-Lamizana Moumouni, Chandre Fabrice, Carnevale Pierre
Source
Medical and Veterinary Entomology, 2001,
15 (1), p. 105-112 ISSN 0269-283X
A new approach is proposed in the treatment of mosquito nets, using a 'two-in-one' combination of pyrethroid and non-pyrethroid insecticides applied to different parts of bednets. The objectives are mainly to overcome certain limitations of pyrethroid-impregnated bednets currently recommended for malaria control purposes. Apart from developing alternatives to pyrethroid dependency, we sought to counteract pyrethroid irritant effects on mosquitoes (excito-repellancy) and resistance to pyrethroids. The idea takes advantage of the presumed host-seeking behaviour of mosquitoes confronted by a net draped over a bed, whereby the mosquito may explore the net from the top downwards. Thus, nets could be more effective if treated on the upper part with residual non-irritant insecticide (carbamate or organophosphate) and with a pyrethroid on the lower part. Sequential exposure to different insecticides with distinct modes of action is equivalent to the use of a mixture as a potential method of managing insecticide resistance. We also intended to improve the control of nuisance mosquitoes, especially Culex quinquefasciatus Say (Diptera : Culicidae) that often survive pyrethroids, in order to encourage public compliance with use of insecticide-treated nets (ITNs). Polyester bednets were pretreated with residual pyrethroid (bifenthrin 50 mg/m2 or deltamethrin 25 mg/m2) on the lower half and with carbamate (carbosulfan 300 mg/m2) on the upper half to minimize contact with net users. Unreplicated examples of these 'two-in-one' treated nets were field-tested against wild mosquitoes, in comparison with an untreated net and bednets treated with each insecticide alone, including PermaNet(TM) wash-resistant formulation of deltamethrin 50 mg/m2... (D'après résumé d'auteur)
