title: Susceptibility of triatoma infestans to deltamethrin in Rio Grande do Sul, Brazil.
abstract: Strategies for controlling Chagas disease are based on spraying infested houses with pyrethroid insecticides. However, the intense use of these insecticides has promoted resistance of Triatoma infestans and, in Argentina, Bolivia and Southern Brazil, low levels of resistance have been reported. Due to the persistence of T. infestans in the state of Rio Grande do Sul (RS), we evaluated the occurrence of deltamethrin resistance in four strains from different municipalities in comparison to two susceptible strains from Brazil and one resistant strain from Bolivia. The results indicated the absence of resistance in T. infestansfrom RS.
authors.affiliation: Laboratório de Triatomíneos e Epidemiologia da Doença de Chagas, Instituto de Pesquisas René Rachou, Fiocruz, Belo Horizonte, MG 30190-002, Brasil. ivansonoda@hotmail.com
authors.forename: Ivan Vieira
authors.initials: IV
authors.lastname: Sonoda
authors.forename: Grasiele Caldas D'Avila
authors.initials: GC
authors.lastname: Pessoa
authors.forename: Mirko Rojas
authors.initials: MR
authors.lastname: Cortez
authors.forename: João Carlos Pinto
authors.initials: JC
authors.lastname: Dias
authors.forename: Alvaro José
authors.initials: AJ
authors.lastname: Romanha
authors.forename: Liléia
authors.initials: L
authors.lastname: Diotaiuti
mesh_terms: D000818:Animals; D001838:Bolivia; D001938:Brazil; D007305:Insecticide Resistance; D007306:Insecticides; D009570:Nitriles; D009758:Nymph / Q000187:drug effects / Q000254:growth & development; D011722:Pyrethrins; D014224:Triatoma
chemical_list: D007306:Insecticides; D009570:Nitriles; D011722:Pyrethrins; C017180:decamethrin