title: Monitoring of resistance to the pyrethroid cypermethrin in Brazilian Aedes aegypti (Diptera: Culicidae) populations collected between 2001 and 2003.
abstract: Resistance to cypermethrin of different Aedes aegypti Brazilian populations, collected at two successive periods (2001 and 2002/2003), was monitored using the insecticide-coated bottles bioassay. Slight modifications were included in the method to discriminate between mortality and the knock down effect. Although this pyrethroid was recently started to be used in the country to control the dengue vector, a decrease in susceptibility was noted between both periods analyzed, particularly in the city of Rio de Janeiro. The results indicate that resistance is due at least in part to a target site alteration.
authors.affiliation: Departamento de Entomologia, Instituto Oswaldo Cruz, Fiocruz, 21045-900 Rio de Janeiro, RJ, Brazil.
authors.forename: Marcella Pereira
authors.initials: MP
authors.lastname: da-Cunha
authors.forename: José Bento Pereira
authors.initials: JB
authors.lastname: Lima
authors.forename: William G
authors.initials: WG
authors.lastname: Brogdon
authors.forename: Gonzalo Efrain
authors.initials: GE
authors.lastname: Moya
authors.forename: Denise
authors.initials: D
authors.lastname: Valle
mesh_terms: D000330:Aedes; D000818:Animals; D001938:Brazil; D007303:Insect Vectors; D007305:Insecticide Resistance; D007306:Insecticides; D011722:Pyrethrins
chemical_list: D007306:Insecticides; D011722:Pyrethrins; C017160:cypermethrin