Donnees recentes sur la sensibilite d'Anopheles arabiensis et d'Anopheles funestus aux pyrethrinoides et au DDT sur les Hautes Terres Centrales de Madagascar -Resultats preliminaires montrant une absence de la mutation kdr chez An. arabiensis

"Recent observations on the sensitivity to pyrethroids and DDT of Anopheles arabiensis and Anopheles funestus in the central Highlands of Madagascar; preliminary resultson the absence of the kdr mutation in An. arabiensis"". Anopheles arabiensis and Anopheles funestus are the principal vectors of malaria on the central highlands of Madagascar. These two species of mosquito are directly or indirectly the targets of indoor insecticide spread. The survey of the susceptibility of these two vectors to insecticides is essential specifying for the anti-vectorial current directives and for the future programs. This paper describes : - the recent tests of susceptibility and the study of the knock-down effect of four pyrethroids (deltamethrin 0.50"