Susceptibilidad en Aedes aegypti (Diptera: Culicidae) del municipio de Soledad (Atlántico, Colombia) a etofenprox y alfacipermetrina
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Fecha
2017-01
Autores
Maestre-Serrano, Ronald
Ponce-García, Gustavo
Flores-Suárez, Adriana
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Editor
Sociedad Colombiana de Entomología
Resumen
El dengue es una enfermedad viral de interés en salud pública para el municipio de Soledad (departamento
del Atlántico, Colombia). Estudios para este municipio han registrado resistencia a insecticidas en Aedes aegypti, principal
vector de este virus. En este estudio se determinó el estado de la susceptibilidad a etofenprox y alfacipermetrina
en una población de Ae. aegypti recolectada en 2013 en el municipio de Soledad. Mediante el método de botellas
impregnadas del CDC (Centers for Disease Control and Prevention), se calculó el factor de resistencia a partir de la
determinación de la concentración “knock-down” 50 (CK50) y la concentración letal 50 (CL50) para cada insecticida
en la población silvestre y la cepa susceptible (Rockefeller). La población silvestre de Ae. aegypti evaluada registró
baja resistencia al derribo al insecticida etofenprox (FRCK50 = 1,8X) y a las 24 horas post-exposición (FRCL50 = 2,2X);
mientras que para alfacipermetrina registró alta resistencia al derribo (FR CK50 = 12,9X) y a las 24 horas post-exposición
(FR CL50 = 18,9X). Se encontró alta resistencia al piretroide alfacipermetrina en la población de Ae. aegypti evaluada.
El etofenprox podría ser un insecticida alternativo para el control del vector de dengue en el municipio de Soledad,
departamento del Atlántico.
Dengue is a viral disease of interest to public health for the municipality of Soledad in the Atlantico department (Colombia). Previous studies for this municipality have registered resistance to insecticides in Aedes aegypti, the main vector of the dengue virus. The susceptibility status to etofenprox and alpha- cypermethrin was determined in a population of Ae. aegypti collected in 2013 from the municipality of Soledad. The resistance factor was calculated using the bottle bioassay from the CDC (Centers for Disease Control and Prevention) based on 50% of knockdown concentration (KC50) and 50 % of lethal concentration (LC50) for each insecticide in the field population and the susceptible strain (Rockefeller). The field population of Ae. aegypti showed low level of knock-down resistance to the insecticide etofenprox (FRKC50 = 1.8X) and at 24 hours post-exposure (FRLC50 = 2.2X); meanwhile for alpha-cypermethrin the population registered high knock down resistance (FRKC50 = 12.9X) and at 24 hours post-exposure (FRLC50 = 18.9X). High resistance to the pyrethroid alpha-cypermethrin was found in the population of Ae. aegypti evaluated. The etofenprox could be an alternative insecticide for the control of the dengue vector in the municipality of Soledad, Atlantico department.
Dengue is a viral disease of interest to public health for the municipality of Soledad in the Atlantico department (Colombia). Previous studies for this municipality have registered resistance to insecticides in Aedes aegypti, the main vector of the dengue virus. The susceptibility status to etofenprox and alpha- cypermethrin was determined in a population of Ae. aegypti collected in 2013 from the municipality of Soledad. The resistance factor was calculated using the bottle bioassay from the CDC (Centers for Disease Control and Prevention) based on 50% of knockdown concentration (KC50) and 50 % of lethal concentration (LC50) for each insecticide in the field population and the susceptible strain (Rockefeller). The field population of Ae. aegypti showed low level of knock-down resistance to the insecticide etofenprox (FRKC50 = 1.8X) and at 24 hours post-exposure (FRLC50 = 2.2X); meanwhile for alpha-cypermethrin the population registered high knock down resistance (FRKC50 = 12.9X) and at 24 hours post-exposure (FRLC50 = 18.9X). High resistance to the pyrethroid alpha-cypermethrin was found in the population of Ae. aegypti evaluated. The etofenprox could be an alternative insecticide for the control of the dengue vector in the municipality of Soledad, Atlantico department.
Descripción
Palabras clave
Resistencia a insecticidas, Piretroides, Control de vectores, Insecticide resistance, Pyrethroids, Vector control