Susceptibility of triatoma infestans to deltamethrin in Rio Grande do Sul, Brazil.
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.
Sonoda
Ivan Vieira
IV
Laboratório de Triatomíneos e Epidemiologia da Doença de Chagas, Instituto de Pesquisas René Rachou, Fiocruz, Belo Horizonte, MG 30190-002, Brasil. ivansonoda@hotmail.com
Pessoa
Grasiele Caldas D'Avila
GC
Cortez
Mirko Rojas
MR
Dias
João Carlos Pinto
JC
Romanha
Alvaro José
AJ
Diotaiuti
Liléia
L
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
D007306:Insecticides; D009570:Nitriles; D011722:Pyrethrins; C017180:decamethrin