Is imidacloprid an effective alternative for controlling pyrethroid-resistant populations of Triatoma infestans (Hemiptera: Reduviidae) in the Gran Chaco ecoregion?
Mem. Inst. Oswaldo Cruz
; 109(6): 761-766, 09/09/2014. tab, graf
Artigo
em Inglês
| LILACS
| ID: lil-723987
Biblioteca responsável:
BR1.1
ABSTRACT
The prevention of Chagas disease is based primarily on the chemical control of Triatoma infestans (Klug) using pyrethroid insecticides. However, high resistance levels, correlated with control failures, have been detected in Argentina and Bolivia. A previous study at our laboratory found that imidacloprid could serve as an alternative to pyrethroid insecticides. We studied the delayed toxicity of imidacloprid and the influence of the blood feeding condition of the insect on the toxicity of this insecticide; we also studied the effectiveness of various commercial imidacloprid formulations against a pyrethroid-resistant T. infestans population from the Gran Chaco ecoregion. Variations in the toxic effects of imidacloprid were not observed up to 72 h after exposure and were not found to depend on the blood feeding condition of susceptible and resistant individuals. Of the three different studied formulations of imidacloprid on glass and filter paper, only the spot-on formulation was effective. This formulation was applied to pigeons at doses of 1, 5, 20 and 40 mg/bird. The nymphs that fed on pigeons treated with 20 mg or 40 mg of the formulation showed a higher mortality rate than the control group one day and seven days post-treatment (p < 0.01). A spot-on formulation of imidacloprid was effective against pyrethroid-resistant T. infestans populations at the laboratory level.
Texto completo:
Disponível
Coleções:
Bases de dados internacionais
Contexto em Saúde:
Agenda de Saúde Sustentável para as Américas
/
ODS3 - Saúde e Bem-Estar
/
Doenças Negligenciadas
Problema de saúde:
Objetivo 10: Doenças transmissíveis
/
Meta 3.3: Acabar com as doenças tropicais negligenciadas e combater as doenças transmissíveis
/
Zoonoses
Base de dados:
LILACS
Assunto principal:
Piretrinas
/
Triatoma
/
Imidazóis
/
Insetos Vetores
/
Inseticidas
/
Nitrocompostos
Limite:
Animais
País/Região como assunto:
América do Sul
/
Argentina
/
Bolívia
Idioma:
Inglês
Revista:
Mem. Inst. Oswaldo Cruz
Assunto da revista:
Medicina Tropical
/
Parasitologia
Ano de publicação:
2014
Tipo de documento:
Artigo
/
Documento de projeto
País de afiliação:
Argentina
Instituição/País de afiliação:
Instituto de Investigaciones Científicas y Técnicas para la Defensa/AR