title: Insecticide impregnation can restore the efficiency of torn bed nets and reduce man-vector contact in malaria endemic areas.
abstract: Three trials with torn bed nets impregnated with permethrin and deltamethrin were made under field conditions at the Soumousso Field Station and the Vallée du Kou rice-field area, both in Burkina Faso, and the Djoumouna fish pond area in the Congo Republic. Even a considerably torn correctly impregnated bed net could be an useful method for limiting human-anopheline contacts. But bed nets in poor condition, i.e. too little impregnated and too much torn, cannot protect the users against anopheline bites. Protection increases with insecticide concentration, but at a high dosage insecticide could have more a repellent than a killing effect. Therefore a balance has to be found for the optimum rate of insecticide treatment of bed nets to obtain a real reduction in malaria transmission and morbidity, in every epidemiological situation.
authors.affiliation: Service d'Entomologie Médicale, Antenne ORSTOM auprès de l'OCEAC, Yaoundé, Cameroun.
authors.forename: P
authors.initials: P
authors.lastname: Carnevale
authors.forename: P
authors.initials: P
authors.lastname: Bitsindou
authors.forename: L
authors.initials: L
authors.lastname: Diomandé
authors.forename: V
authors.initials: V
authors.lastname: Robert
mesh_terms: D000818:Animals; D000852:Anopheles; D004305:Dose-Response Relationship, Drug; D006801:Humans; D007303:Insect Vectors; D007306:Insecticides / Q000008:administration & dosage*; D016778:Malaria, Falciparum / Q000517:prevention & control* / Q000635:transmission; D009032:Mosquito Control / Q000379:methods*; D009570:Nitriles; D026023:Permethrin; D011722:Pyrethrins / Q000008:administration & dosage*
chemical_list: D007306:Insecticides; D009570:Nitriles; D011722:Pyrethrins; C017180:decamethrin; D026023:Permethrin