Insecticide resistance levels and associated mechanisms in three Aedes aegypti populations from Venezuela
Mem. Inst. Oswaldo Cruz
; 118: e220210, 2023. tab, graf
Artigo
em Inglês
|
LILACS-Express
| LILACS
| ID: biblio-1440666
Biblioteca responsável:
BR1.1
ABSTRACT
BACKGROUND The massive use of insecticides in public health has exerted selective pressure resulting in the development of resistance in Aedes aegypti to different insecticides in Venezuela. Between 2010 and 2020, the only insecticides available for vector control were the organophosphates (Ops) fenitrothion and temephos which were focally applied. OBJECTIVES To determine the state of insecticide resistance and to identify the possible biochemical and molecular mechanisms involved in three populations of Ae. aegypti from Venezuela. METHODS CDC bottle bioassays were conducted on Ae. aegypti collected between October 2019 and February 2020 in two hyperendemic localities for dengue in Aragua State and in a malaria endemic area in Bolívar State. Insecticide resistance mechanisms were studied using biochemical assays and polymerase chain reaction (PCR) to detect kdr mutations. FINDINGS Bioassays showed contrasting results among populations; Las Brisas was resistant to malathion, permethrin and deltamethrin, Urbanización 19 de Abril was resistant to permethrin and Nacupay to malathion. All populations showed significantly higher activity of mixed function oxidases and glutathione-S-transferases (GSTs) in comparison with the susceptible strain. The kdr mutations V410L, F1534C, and V1016I were detected in all populations, with F1534C at higher frequencies. MAIN CONCLUSION Insecticide resistance persists in three Ae. aegypti populations from Venezuela even in the relative absence of insecticide application.
Texto completo:
Disponível
Coleções:
Bases de dados internacionais
Contexto em Saúde:
Doenças Negligenciadas
Problema de saúde:
Dengue
/
Malária
Base de dados:
LILACS
Tipo de estudo:
Estudo prognóstico
/
Fatores de risco
País/Região como assunto:
América do Sul
/
Venezuela
Idioma:
Inglês
Revista:
Mem. Inst. Oswaldo Cruz
Assunto da revista:
Medicina Tropical
/
Parasitologia
Ano de publicação:
2023
Tipo de documento:
Artigo
País de afiliação:
Estados Unidos
/
Venezuela
Instituição/País de afiliação:
Ministerio del Poder Popular para la Salud/VE
/
US Centers for Disease Control and Prevention/US
/
Universidad de Carabobo/VE