%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture non répertoriées par l'AERES
%A N'Guessan, R.
%A Darriet, Frédéric
%A Doannio, J.M.C.
%A Chandre, Fabrice
%A Carnevale, Pierre
%T Olyset Net(R) efficacy against pyrethroid-resistant Anopheles gambiae and Culex quinquefasciatus after 3 years' field use in Côte d'Ivoire
%D 2001
%L fdi:010025670
%G ENG
%J Medical and Veterinary Entomology
%@ 0269-283X
%K PALUDISME ; VECTEUR ; MOUSTIQUE ; METHODE DE LUTTE ; MOUSTIQUAIRE IMPREGNEE ; INSECTICIDE CHIMIQUE ; EFFICACITE ; SENSIBILITE RESISTANCE
%K PYRETHROIDE ; PERMETHRINE ; OLYSET
%K COTE D'IVOIRE
%K BOUAKE REGION
%N 1
%P 97-104
%R 10.1046/j.1365-2915.2001.00284.x
%U https://www.documentation.ird.fr/hor/fdi:010025670
%> https://horizon.documentation.ird.fr/exl-doc/pleins_textes/pleins_textes_7/b_fdi_57-58/010025670.pdf
%V 15
%W Horizon (IRD)
%X Pyrethroid-impreganted bednets are advocated for personal protection against malaria vectors. To avoid the need for periodic re-treatment, it would be advantageous to have nets that retain insecticidal efficacy for years and withstand repeated washing. Such a type of commercially produced bednet with permethrin 2% incorporated in polyethylene fibres (trademark Olyset Net(R) supplied by Sumika Life-Tech Co., Osaka, Japan) was evaluated against mosquitoes in veranda-trap huts at Yaokoffikro, near Bouaké, Côte d'Ivoire, by standard WHOPES phase II procedures. Four Olyset Nets were compared with a standard untreated polyester net as control. They comprised three examples previously used in a village for over 3 years (one washed, one dirty, one very dirty) and a previously unused Olyset Net newly unwrapped, from the same orignal batch. Bioassays with 3 min exposure of susceptible #Anopheles gambiae$ Giles (Diptera : Culicidae) gave more than 99% mortality of female mosquitoes tested on the 'new' Olyset Net. The used Olyset Nets gave mortality rates averaging 83% for the washed net, 85% for the dirty net and 55% for the very dirty net (within 24-h following 3 min exposure). Thus, Olyset Nets were found to remain remarkably effective against susceptible #An. gambiae$ for at least 3 years under field conditions. Wild pyrethroid-resistant populations of #Culex quinquefasciatus$ Say and #An. gambiae$ (savanna cytotype with 96% kdr) were assessed during June-August 1999 for their responses to sleepers protected by nets in the experimental huts. With regard to hut entry by foraging female mosquitoes, Olyset Nets showed some deterrency against #An. gambiae$ (44% reduction by the new net, approximately 20% by the dirty nets, none by the washed net), but not against #Cx. quinquefasciatus$. Among mosquitoes entering the hut with untreated control net, 30-34% tried to leave (exophily) but were caught in the veranda trap... (D'après résumé d'auteur)
%$ 052ANOPAL04