Susceptibility of Triatoma sordida Stal, 1859 (Hemiptera: Reduviidae) to alpha-cypermethrin under natural climatic conditions
Abstract:INTRODUCTION:Despite the recommendations by interpretation of resistance ratios obtained in laboratory bioassays, little is known about the actual impact of these results in the effectiveness of vector control activities in the field. In this context, our objective was to determine the mean...
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Sociedade Brasileira de Medicina Tropical (SBMT)
2015
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ftdoajarticles:oai:doaj.org/article:4b9449abe9734d4eb24a4fa342d4d5d9 2023-05-15T15:10:57+02:00 Susceptibility of Triatoma sordida Stal, 1859 (Hemiptera: Reduviidae) to alpha-cypermethrin under natural climatic conditions Grasielle Caldas DÁvila Pessoa Aline Cristine Luiz Rosa Letícia Cavalari João Geraldo de Rezende Bernardino Vaz de Mello Liléia Diotaiuti 2015-08-01T00:00:00Z https://doi.org/10.1590/0037-8682-0097-2015 https://doaj.org/article/4b9449abe9734d4eb24a4fa342d4d5d9 EN eng Sociedade Brasileira de Medicina Tropical (SBMT) http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0037-86822015000400422&lng=en&tlng=en https://doaj.org/toc/1678-9849 1678-9849 doi:10.1590/0037-8682-0097-2015 https://doaj.org/article/4b9449abe9734d4eb24a4fa342d4d5d9 Revista da Sociedade Brasileira de Medicina Tropical, Vol 48, Iss 4, Pp 422-426 (2015) Triatoma sórdida Field bioassays Alpha-cypermethrin susceptibility Arctic medicine. Tropical medicine RC955-962 article 2015 ftdoajarticles https://doi.org/10.1590/0037-8682-0097-2015 2022-12-30T21:48:28Z Abstract:INTRODUCTION:Despite the recommendations by interpretation of resistance ratios obtained in laboratory bioassays, little is known about the actual impact of these results in the effectiveness of vector control activities in the field. In this context, our objective was to determine the mean value of different resistance ratios obtained by laboratory bioassays performed as part of the chemical control strategies of Triatoma sordida in the field.METHODS:Field bioassays were developed in Monte Azul and Coração de Jesus (Southeast, Brazil). In each location, samples were formed with three domestic units treated with alpha-cypermethrin 20.0% (Alfatek (r) 200 SC). One day after spraying, 10 fifth-instar nymphs remained in contact with the surfaces treated (adobe with plaster, adobe without plaster, or wood) with insecticide in plastic cones for 72h. Three cones were exposed inside the intradomicile and the peridomicile. The insects in the control group were exposed to an insecticide-free piece of cardboard. Mortality was measured 72h after removal of the insects from the treated surfaces. The tests were realized in triplicate.RESULTS:Mortality was 100.0% in all locations, except for Monte Azul; Landinho (96.6%) and Coração de Jesus; Barriguda (96.6%).CONCLUSIONS:Although the resistant populations in laboratory tests proved to be susceptible in the field, this observation is not sufficient to suggest that the cut-off points used to justify the resistance ratio should be changed. In this sense, we recommend that laboratory and field bioassays are carried out with a greater number of Triatominae populations to allow more in-depth consideration of the subject. Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Stal’ ENVELOPE(132.800,132.800,59.667,59.667) Revista da Sociedade Brasileira de Medicina Tropical 48 4 422 426 |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
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Triatoma sórdida Field bioassays Alpha-cypermethrin susceptibility Arctic medicine. Tropical medicine RC955-962 |
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Triatoma sórdida Field bioassays Alpha-cypermethrin susceptibility Arctic medicine. Tropical medicine RC955-962 Grasielle Caldas DÁvila Pessoa Aline Cristine Luiz Rosa Letícia Cavalari João Geraldo de Rezende Bernardino Vaz de Mello Liléia Diotaiuti Susceptibility of Triatoma sordida Stal, 1859 (Hemiptera: Reduviidae) to alpha-cypermethrin under natural climatic conditions |
topic_facet |
Triatoma sórdida Field bioassays Alpha-cypermethrin susceptibility Arctic medicine. Tropical medicine RC955-962 |
description |
Abstract:INTRODUCTION:Despite the recommendations by interpretation of resistance ratios obtained in laboratory bioassays, little is known about the actual impact of these results in the effectiveness of vector control activities in the field. In this context, our objective was to determine the mean value of different resistance ratios obtained by laboratory bioassays performed as part of the chemical control strategies of Triatoma sordida in the field.METHODS:Field bioassays were developed in Monte Azul and Coração de Jesus (Southeast, Brazil). In each location, samples were formed with three domestic units treated with alpha-cypermethrin 20.0% (Alfatek (r) 200 SC). One day after spraying, 10 fifth-instar nymphs remained in contact with the surfaces treated (adobe with plaster, adobe without plaster, or wood) with insecticide in plastic cones for 72h. Three cones were exposed inside the intradomicile and the peridomicile. The insects in the control group were exposed to an insecticide-free piece of cardboard. Mortality was measured 72h after removal of the insects from the treated surfaces. The tests were realized in triplicate.RESULTS:Mortality was 100.0% in all locations, except for Monte Azul; Landinho (96.6%) and Coração de Jesus; Barriguda (96.6%).CONCLUSIONS:Although the resistant populations in laboratory tests proved to be susceptible in the field, this observation is not sufficient to suggest that the cut-off points used to justify the resistance ratio should be changed. In this sense, we recommend that laboratory and field bioassays are carried out with a greater number of Triatominae populations to allow more in-depth consideration of the subject. |
format |
Article in Journal/Newspaper |
author |
Grasielle Caldas DÁvila Pessoa Aline Cristine Luiz Rosa Letícia Cavalari João Geraldo de Rezende Bernardino Vaz de Mello Liléia Diotaiuti |
author_facet |
Grasielle Caldas DÁvila Pessoa Aline Cristine Luiz Rosa Letícia Cavalari João Geraldo de Rezende Bernardino Vaz de Mello Liléia Diotaiuti |
author_sort |
Grasielle Caldas DÁvila Pessoa |
title |
Susceptibility of Triatoma sordida Stal, 1859 (Hemiptera: Reduviidae) to alpha-cypermethrin under natural climatic conditions |
title_short |
Susceptibility of Triatoma sordida Stal, 1859 (Hemiptera: Reduviidae) to alpha-cypermethrin under natural climatic conditions |
title_full |
Susceptibility of Triatoma sordida Stal, 1859 (Hemiptera: Reduviidae) to alpha-cypermethrin under natural climatic conditions |
title_fullStr |
Susceptibility of Triatoma sordida Stal, 1859 (Hemiptera: Reduviidae) to alpha-cypermethrin under natural climatic conditions |
title_full_unstemmed |
Susceptibility of Triatoma sordida Stal, 1859 (Hemiptera: Reduviidae) to alpha-cypermethrin under natural climatic conditions |
title_sort |
susceptibility of triatoma sordida stal, 1859 (hemiptera: reduviidae) to alpha-cypermethrin under natural climatic conditions |
publisher |
Sociedade Brasileira de Medicina Tropical (SBMT) |
publishDate |
2015 |
url |
https://doi.org/10.1590/0037-8682-0097-2015 https://doaj.org/article/4b9449abe9734d4eb24a4fa342d4d5d9 |
long_lat |
ENVELOPE(132.800,132.800,59.667,59.667) |
geographic |
Arctic Stal’ |
geographic_facet |
Arctic Stal’ |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Revista da Sociedade Brasileira de Medicina Tropical, Vol 48, Iss 4, Pp 422-426 (2015) |
op_relation |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0037-86822015000400422&lng=en&tlng=en https://doaj.org/toc/1678-9849 1678-9849 doi:10.1590/0037-8682-0097-2015 https://doaj.org/article/4b9449abe9734d4eb24a4fa342d4d5d9 |
op_doi |
https://doi.org/10.1590/0037-8682-0097-2015 |
container_title |
Revista da Sociedade Brasileira de Medicina Tropical |
container_volume |
48 |
container_issue |
4 |
container_start_page |
422 |
op_container_end_page |
426 |
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1766341876712996864 |