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Malathion insecticide resistance in Aedes aegypti : laboratory conditions and in situ experimental approach through adult entomological surveillance
Author(s) -
Leandro André de Souza,
Rios Jean Avemir,
Britto André da Silva,
Galvão Sandro Roberto,
Lopes Renata Defante,
Rivas Açucena Veleh,
Martins Caroline Amaral,
Silva Isaac,
Delai Robson Michael,
Gonçalves Daniela Dib,
Silva Mário Antônio Navarro,
PalacioCortès Angela Maria,
Schuartz Valéria,
Sibim Alessandra Cristiane,
Castro Wagner Antonio Chiba
Publication year - 2020
Publication title -
tropical medicine and international health
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.056
H-Index - 114
eISSN - 1365-3156
pISSN - 1360-2276
DOI - 10.1111/tmi.13474
Subject(s) - malathion , aedes aegypti , biology , toxicology , outbreak , arbovirus , population , insecticide resistance , veterinary medicine , aedes , yellow fever , vector (molecular biology) , pesticide , dengue fever , larva , virology , environmental health , ecology , medicine , virus , biochemistry , gene , recombinant dna
Objective In 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 of Ae. aegypti to the insecticide, malathion, in situ. The location of this study was the municipality of Foz do Iguaçu, in the state of Paraná, Brazil. Methods Ultra‐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. Results We found 220 adult female specimens and 7423 eggs of Ae. aegypti in 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.