Susceptibility of phlebotomine sandflies (Diptera: Psychodidae) collected in the field, to alpha-cypermethrin in four municipalities endemic to leishmaniasis
ABSTRACT Although the chemical control against leishmaniasis began in 1953 in Brazil, little information is available on how this strategy has affected populations of phlebotomine sandflies in the field. The objective of this study was to analyze the susceptibility profile of four populations of phlebotomine sandflies to the insecticide alpha-cypermethrin. Sandflies collected in field in four Brazilian municipalities were evaluated using CDC bottles in different concentrations of alpha-cypermethrin. A total of 1,186 phlebotomine sandflies were used in the bioassays. The LD50 ranged from 1.48 to 2.57 ug/mL in the field populations. For a dose of 5 ug/mL of alpha-cypermethrin, the LT50 and LT95 ranged from 17.9 to 27.5 minutes, and LT95 from 39.7 to 61.5 minutes, respectively. All the populations studied were highly susceptible to the insecticide alpha-cypermethrin. Routine studies are needed to detect changes in sandflies susceptibility to insecticides.
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Instituto de Medicina Tropical de São Paulo
2020
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oai:scielo:S0036-466520200001006042020-06-03Susceptibility of phlebotomine sandflies (Diptera: Psychodidae) collected in the field, to alpha-cypermethrin in four municipalities endemic to leishmaniasisRocha,Douglas de AlmeidaAndrade,Andrey José deMoura,Luciana ReinaldoFigueiredo,Nelder GontijoPessoa,Grasielle Caldas D’ÁvilaObara,Marcos Takashi Phlebotominae Leishmaeniasis Insecticide resistance Bioassay Alpha-cypermethrin ABSTRACT Although the chemical control against leishmaniasis began in 1953 in Brazil, little information is available on how this strategy has affected populations of phlebotomine sandflies in the field. The objective of this study was to analyze the susceptibility profile of four populations of phlebotomine sandflies to the insecticide alpha-cypermethrin. Sandflies collected in field in four Brazilian municipalities were evaluated using CDC bottles in different concentrations of alpha-cypermethrin. A total of 1,186 phlebotomine sandflies were used in the bioassays. The LD50 ranged from 1.48 to 2.57 ug/mL in the field populations. For a dose of 5 ug/mL of alpha-cypermethrin, the LT50 and LT95 ranged from 17.9 to 27.5 minutes, and LT95 from 39.7 to 61.5 minutes, respectively. All the populations studied were highly susceptible to the insecticide alpha-cypermethrin. Routine studies are needed to detect changes in sandflies susceptibility to insecticides.info:eu-repo/semantics/openAccessInstituto de Medicina Tropical de São PauloRevista do Instituto de Medicina Tropical de São Paulo v.62 20202020-01-01info:eu-repo/semantics/othertext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0036-46652020000100604en10.1590/s1678-9946202062038 |
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Rocha,Douglas de Almeida Andrade,Andrey José de Moura,Luciana Reinaldo Figueiredo,Nelder Gontijo Pessoa,Grasielle Caldas D’Ávila Obara,Marcos Takashi |
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Rocha,Douglas de Almeida Andrade,Andrey José de Moura,Luciana Reinaldo Figueiredo,Nelder Gontijo Pessoa,Grasielle Caldas D’Ávila Obara,Marcos Takashi Susceptibility of phlebotomine sandflies (Diptera: Psychodidae) collected in the field, to alpha-cypermethrin in four municipalities endemic to leishmaniasis |
author_facet |
Rocha,Douglas de Almeida Andrade,Andrey José de Moura,Luciana Reinaldo Figueiredo,Nelder Gontijo Pessoa,Grasielle Caldas D’Ávila Obara,Marcos Takashi |
author_sort |
Rocha,Douglas de Almeida |
title |
Susceptibility of phlebotomine sandflies (Diptera: Psychodidae) collected in the field, to alpha-cypermethrin in four municipalities endemic to leishmaniasis |
title_short |
Susceptibility of phlebotomine sandflies (Diptera: Psychodidae) collected in the field, to alpha-cypermethrin in four municipalities endemic to leishmaniasis |
title_full |
Susceptibility of phlebotomine sandflies (Diptera: Psychodidae) collected in the field, to alpha-cypermethrin in four municipalities endemic to leishmaniasis |
title_fullStr |
Susceptibility of phlebotomine sandflies (Diptera: Psychodidae) collected in the field, to alpha-cypermethrin in four municipalities endemic to leishmaniasis |
title_full_unstemmed |
Susceptibility of phlebotomine sandflies (Diptera: Psychodidae) collected in the field, to alpha-cypermethrin in four municipalities endemic to leishmaniasis |
title_sort |
susceptibility of phlebotomine sandflies (diptera: psychodidae) collected in the field, to alpha-cypermethrin in four municipalities endemic to leishmaniasis |
description |
ABSTRACT Although the chemical control against leishmaniasis began in 1953 in Brazil, little information is available on how this strategy has affected populations of phlebotomine sandflies in the field. The objective of this study was to analyze the susceptibility profile of four populations of phlebotomine sandflies to the insecticide alpha-cypermethrin. Sandflies collected in field in four Brazilian municipalities were evaluated using CDC bottles in different concentrations of alpha-cypermethrin. A total of 1,186 phlebotomine sandflies were used in the bioassays. The LD50 ranged from 1.48 to 2.57 ug/mL in the field populations. For a dose of 5 ug/mL of alpha-cypermethrin, the LT50 and LT95 ranged from 17.9 to 27.5 minutes, and LT95 from 39.7 to 61.5 minutes, respectively. All the populations studied were highly susceptible to the insecticide alpha-cypermethrin. Routine studies are needed to detect changes in sandflies susceptibility to insecticides. |
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Instituto de Medicina Tropical de São Paulo |
publishDate |
2020 |
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http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0036-46652020000100604 |
work_keys_str_mv |
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