title: [Monitoring the susceptibility of Triatoma sordida Stål, 1859 (Hemiptera: Reduviidae) to deltamethrin insecticide, in Central-Western Brazil].
abstract: BACKGROUND
  Triatoma sordida Stål, 1859 populations were investigated for susceptibility to deltamethrin.
  
  
  METHODS
  This study aimed to analyze the resistance of 11 populations of insects from the States of Goiás, Mato Grosso and Mato Grosso do Sul by topical application bioassays.
  
  
  RESULTS
  The estimated LD50 and RR50 showed high levels of susceptibility (LD50 < 1 and RR50 < 2). However, analysis of the slope of the dose response curve showed that the populations of insects in the towns of Firminópolis/GO, Posse/GO, Poxoréu/MT, Douradina/MS and Aparecida do Taboado/MS present great probability of evolving resistance and, thus, are more likely to tolerate treatment with deltamethrin.
  
  
  CONCLUSIONS
  Small changes in susceptibility and low levels of resistance were detected, but the temporal changes of susceptibility should be continuously monitored to adequately guide the actions of vector-control of DC.
authors.affiliation: Laboratório de Entomologia Médica, Secretaria de Vigilância em Saúde, Ministério da Saúde, Brasília, DF. marcos.obara@saude.gov.br
authors.forename: Marcos Takashi
authors.initials: MT
authors.lastname: Obara
authors.forename: Vanessa Camargo Garbeloto
authors.initials: VC
authors.lastname: Otrera
authors.forename: Rodrigo Gurgel
authors.initials: RG
authors.lastname: Gonçalves
authors.forename: Janduhy Pereira dos
authors.initials: JP
authors.lastname: Santos
authors.forename: Marcelo
authors.initials: M
authors.lastname: Santalucia
authors.forename: João Aristeu da
authors.initials: JA
authors.lastname: Rosa
authors.forename: Paulo Silva de
authors.initials: PS
authors.lastname: Almeida
authors.forename: José Maria Soares
authors.initials: JM
authors.lastname: Barata
mesh_terms: D000818:Animals; D001938:Brazil; D007303:Insect Vectors; D007305:Insecticide Resistance; D007306:Insecticides; D009570:Nitriles; D011722:Pyrethrins; D014224:Triatoma
chemical_list: D007306:Insecticides; D009570:Nitriles; D011722:Pyrethrins; C017180:decamethrin