Jairo Campos1, Carlos F S Andrade. 1. Departamento de Zoologia do Instituto de Biologia da Universidade Estadual de Campinas, Campinas, SP, Brasil.
Abstract
OBJECTIVE: To evaluate the susceptibility to chemical insecticides of Culex quinquefasciatus and Aedes aegypt larvae from areas subjected to control treatments or not. METHODS: Bioassays for diagnostic concentration and multiple concentration were performed for organophosphate and pyrethroid insecticides according to World Health Organization parameters. The susceptibility was assessed for mosquito larvae collected from an area not subjected to chemical control (Campinas, State of S o Paulo, SP) and from other areas (Campo Grande, Mato Grosso do Sul, MS, and Cuiabá, Mato Grosso, MT), in Brazil, subjected to such treatments. RESULTS: Tests for Culex quinquefasciatus larvae from Campinas, SP, allowed suspicion of resistance to cypermethrin and gave evidence of resistance to cyfluthrin. Larvae of this species collected in Campo Grande, MS, and Campinas, SP, presented resistance to temephos. For the colony from the latter locality, the following resistance rates were established: RR50=6.36 and RR95=4.94, in relation to a standard susceptible strain. Moreover, tests for Aedes aegypti showed similar susceptibility to temephos for a field population from Cuiabá, MT, and a laboratory population. CONCLUSIONS: The results indicate resistance of Culex quinquefasciatus to organophosphate and pyrethroid insecticides and make evident the need for evaluation and monitoring of the efficiency of insecticides to be used in mosquito control programs.
OBJECTIVE: To evaluate the susceptibility to chemical insecticides of Culex quinquefasciatus and Aedes aegypt larvae from areas subjected to control treatments or not. METHODS: Bioassays for diagnostic concentration and multiple concentration were performed for organophosphate and pyrethroid insecticides according to World Health Organization parameters. The susceptibility was assessed for mosquito larvae collected from an area not subjected to chemical control (Campinas, State of S o Paulo, SP) and from other areas (Campo Grande, Mato Grosso do Sul, MS, and Cuiabá, Mato Grosso, MT), in Brazil, subjected to such treatments. RESULTS: Tests for Culex quinquefasciatus larvae from Campinas, SP, allowed suspicion of resistance to cypermethrin and gave evidence of resistance to cyfluthrin. Larvae of this species collected in Campo Grande, MS, and Campinas, SP, presented resistance to temephos. For the colony from the latter locality, the following resistance rates were established: RR50=6.36 and RR95=4.94, in relation to a standard susceptible strain. Moreover, tests for Aedes aegypti showed similar susceptibility to temephos for a field population from Cuiabá, MT, and a laboratory population. CONCLUSIONS: The results indicate resistance of Culex quinquefasciatus to organophosphate and pyrethroid insecticides and make evident the need for evaluation and monitoring of the efficiency of insecticides to be used in mosquito control programs.
Authors: Rizwan Mustafa Shah; Mahbob Alam; Daniyal Ahmad; Muhammad Waqas; Qasim Ali; Muhammad Binyamin; Sarfraz Ali Shad Journal: Parasitol Res Date: 2016-08-17 Impact factor: 2.289
Authors: Lilian N D Silva; José A Ribeiro-Neto; Jéssica M M Valadares; Mariana M Costa; Luciana A R S Lima; Luciano A M Grillo; Vanessa F Cortes; Herica L Santos; Stênio N Alves; Leandro A Barbosa Journal: J Membr Biol Date: 2016-03-18 Impact factor: 1.843
Authors: Danilo O Carvalho; Derric Nimmo; Neil Naish; Andrew R McKemey; Pam Gray; André B B Wilke; Mauro T Marrelli; Jair F Virginio; Luke Alphey; Margareth L Capurro Journal: J Vis Exp Date: 2014-01-04 Impact factor: 1.355
Authors: Mateus Chediak; Fabiano G Pimenta; Giovanini E Coelho; Ima A Braga; José Bento P Lima; Karina Ribeiro Lj Cavalcante; Lindemberg C de Sousa; Maria Alice V de Melo-Santos; Maria de Lourdes da G Macoris; Ana Paula de Araújo; Constância Flávia J Ayres; Maria Teresa M Andrighetti; Ricristhi Gonçalves de A Gomes; Kauara B Campos; Raul Narciso C Guedes Journal: Mem Inst Oswaldo Cruz Date: 2016-04-29 Impact factor: 2.743