title: Evaluation of permethrin-impregnated mosquito-nets against mosquitoes in China.
abstract: In Yishan County, Guangxi Province, China, where malaria and Brugian filariasis are transmitted by vectors belonging to the Anopheles hyrcanus Pallas group, a study was conducted from June to November 1986 to evaluate the effectiveness of permethrin-impregnated mosquito bednets to reduce man/vector contact. In three experimental villages a total of 246 mosquito nets were treated with permethrin EC at a dosage of 0.5 g/m2. Control bioassays (1 h exposure) of treated nets gave up to 100% mortality of Armigeres subalbatus (Coquillett), Anopheles sinensis Wiedemann and Culex tritaeniorhynchus Giles for up to 19 weeks. During 5 months evaluation in the villages, permethrin-impregnated mosquito-nets reduced the number of mosquitoes found inside nets by 99.3% for Culex quinquefasciatus Say, by 94.4% for Anopheles sinensis Wiedemann and by 75% for Anopheles lesteri anthropophagus Xu & Feng. This measure could thus be considered an appropriate means of controlling vectors in villages.
authors.affiliation: Institute of Parasitic Diseases, Chinese Academy of Preventive Medicine (WHO Collaborating Centre for Malaria, Schistosomiasis and Filariasis), Shanghai.
authors.forename: J J
authors.initials: JJ
authors.lastname: Xu
authors.forename: M L
authors.initials: ML
authors.lastname: Zao
authors.forename: X F
authors.initials: XF
authors.lastname: Luo
authors.forename: R G
authors.initials: RG
authors.lastname: Geng
authors.forename: S X
authors.initials: SX
authors.lastname: Pan
authors.forename: S Y
authors.initials: SY
authors.lastname: Liu
mesh_terms: D000818:Animals; D001512:Bedding and Linens; D002681:China; D009033:Culicidae; D005260:Female; D006801:Humans; D007303:Insect Vectors; D007306:Insecticides; D009032:Mosquito Control / Q000379:methods*; D026023:Permethrin; D011722:Pyrethrins
chemical_list: D007306:Insecticides; D011722:Pyrethrins; D026023:Permethrin