Malathion insecticide resistance inAedes aegypti: laboratory conditions andin situexperimental approach through adult entomological surveillance

• DOI: 10.1111/tmi.13474
• Publication Date: 2020-08-03T21:17:42Z
• Authors: André de Souza Le...; Jean Avemir Rios; André da Silva Br...; Sandro Roberto Ga...; Renata Defante Lopes; Açucena Veleh Rivas; Caroline Amaral M...; Isaac da Silva; Robson Michael Delai; Daniela Dib Gonça...; Mário Antônio Nav...; Angela Maria Pala...; Valéria Schuartz; Alessandra Cristi...; Wagner Antonio Ch...
• Keywords: Insecticides; Mosquito Control; Incidence; Mosquito Vectors; Dengue; Insecticide Resistance; 03 medical and health sciences; 0302 clinical medicine; Aedes; Malathion; Animals; Brazil

AbstractObjectiveIn Brazil, the most common method of controlling outbreaks of arbovirus is by the use of chemical sprays, which kill the insect vector,Aedes aegypti. The main objective of this study was to evaluate the resistance ofAe. aegyptito the insecticide, malathion, in situ. The location of this study was the municipality of Foz do Iguaçu, in the state of Paraná, Brazil.MethodsUltra‐low‐volume (ULV) fogging equipment was used, by vehicle, to apply the insecticide in situ, and mosquito populations after treatment were compared with those of control areas. The resistance of strains collected from the municipality was compared to the Rockefeller strain under laboratory conditions.ResultsWe found 220 adult female specimens and 7423 eggs ofAe. aegyptiin the areas subjected to UBV treatment, whereas 245 adult females and 10 557 eggs were found in the control areas. The UBV treatment area showed no significant difference compared to the control area, for all the indices. Mortality of the Rockefeller colony varied more quickly when there were slight variations in malathion concentration than the Foz do Iguaçu population.