Susceptibility of Aedes aegypti larvae to the insecticide temephos in the Federal District, Brazil
Autor(a) principal: | |
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Data de Publicação: | 2004 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | por eng |
Título da fonte: | Revista de Saúde Pública |
Texto Completo: | https://www.revistas.usp.br/rsp/article/view/31772 |
Resumo: | OBJECTIVE: To study the susceptibility status of Aedes aegypti to the organophosphate insecticide temephos. METHODS: Samples of Ae. aegypti larvae were obtained, using ovitraps, from eight cities of the Federal District, central Brazil, in 2000 and 2001. Larvae were submitted to the diagnostic dose of 0.012 mg/l temephos, as recommended by standard World Health Organization methodology. Field populations were tested in parallel with reference strains Rockefeller and DIVAL, from the Environmental Surveillance Directory (DIVAL) insectary. The concentration and purity of temephos solutions were verified by gas chromatography. Correlation calculations were performed using StatView - SAS Institute Inc., version 5. Student's t test was used for detecting differences in susceptibility, with significance levels of alpha=0.05. RESULTS: In 2000, Ae. aegypti larvae populations from Taguatinga, Guará, and Núcleo Bandeirante showed resistance to temephos, with mortality ranging from 54.1 to 63.4%. The populations from Gama, Planaltina, and Sobradinho showed altered levels of susceptibility (mortality ranging from 83.6 to 92.8%). The population from Ceilândia was the only susceptible one, with 98% mortality. In 2001, all populations tested were resistant (44.4 to 66.4% mortality). No significant correlation was found between the susceptibility of populations and the distance between the cities of origin, or the amount of insecticide applied in the years preceding the study. CONCLUSIONS: Ae. aegypti susceptibility to temephos is changing in the Federal District. It is essential to continue monitoring the resistance of this vector to insecticides in order to ensure the efficiency of programs aimed at vector control and at the protection of human health. |
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Susceptibility of Aedes aegypti larvae to the insecticide temephos in the Federal District, Brazil Suscetibilidade de larvas de Aedes aegypti ao inseticida temefós no Distrito Federal AedesTemefósResistência a inseticidasControle de vetoresInsetos vetoresAedesTemephosInsecticide resistanceVector controlInsect vectors OBJECTIVE: To study the susceptibility status of Aedes aegypti to the organophosphate insecticide temephos. METHODS: Samples of Ae. aegypti larvae were obtained, using ovitraps, from eight cities of the Federal District, central Brazil, in 2000 and 2001. Larvae were submitted to the diagnostic dose of 0.012 mg/l temephos, as recommended by standard World Health Organization methodology. Field populations were tested in parallel with reference strains Rockefeller and DIVAL, from the Environmental Surveillance Directory (DIVAL) insectary. The concentration and purity of temephos solutions were verified by gas chromatography. Correlation calculations were performed using StatView - SAS Institute Inc., version 5. Student's t test was used for detecting differences in susceptibility, with significance levels of alpha=0.05. RESULTS: In 2000, Ae. aegypti larvae populations from Taguatinga, Guará, and Núcleo Bandeirante showed resistance to temephos, with mortality ranging from 54.1 to 63.4%. The populations from Gama, Planaltina, and Sobradinho showed altered levels of susceptibility (mortality ranging from 83.6 to 92.8%). The population from Ceilândia was the only susceptible one, with 98% mortality. In 2001, all populations tested were resistant (44.4 to 66.4% mortality). No significant correlation was found between the susceptibility of populations and the distance between the cities of origin, or the amount of insecticide applied in the years preceding the study. CONCLUSIONS: Ae. aegypti susceptibility to temephos is changing in the Federal District. It is essential to continue monitoring the resistance of this vector to insecticides in order to ensure the efficiency of programs aimed at vector control and at the protection of human health. OBJETIVO: Estudar o padrão de suscetibilidade do Aedes aegypti ao inseticida organofosforado temefós. MÉTODOS: Amostras de larvas de Ae. aegypti foram obtidas com armadilhas para oviposição, em oito cidades do Distrito Federal, nos anos 2000 e 2001. As larvas foram submetidas à dose diagnóstica de 0,012 mg/l de temefós, segundo metodologia padronizada pela Organização Mundial da Saúde. As populações de campo foram testadas em paralelo com a cepa de referência Rockefeller e a cepa DIVAL, do insetário da Diretoria de Vigilância Ambiental. A concentração e a pureza das soluções de temefós foram analisadas por cromatografia gasosa. Os cálculos de correlação foram determinados pelo programa StatView - SAS Institute Inc., versão 5. Utilizou-se o teste t de Student para verificar diferenças de suscetibilidade, com níveis de significância, alfa=0,05. RESULTADOS: Em 2000, as populações de larvas de Ae. aegypti nas cidades de Taguatinga, Guará e Núcleo Bandeirante apresentaram-se resistentes ao temefós, com mortalidade de larvas entre 54,1 e 63,4%. As populações do Gama, Planaltina e Sobradinho apresentaram alterações nos níveis de suscetibilidade (mortalidade de 83,6 a 92,8%). A população de Ceilândia foi a única suscetível, com 98% de mortalidade. Em 2001, todas as populações testadas mostraram-se resistentes (44,4 a 66,4% de mortalidade). Nenhuma correlação significativa foi encontrada entre a suscetibilidade das populações e a distância entre essas cidades ou a quantidade de inseticida aplicado nos anos anteriores ao estudo. CONCLUSÕES: Os níveis de suscetibilidade do Ae. aegypti ao temefós vêm se alterando no Distrito Federal. É essencial a continuidade de programas de monitoramento da resistência desse vetor aos inseticidas para se garantir a eficiência dos programas de controle e a proteção da saúde humana. Universidade de São Paulo. Faculdade de Saúde Pública2004-10-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfhttps://www.revistas.usp.br/rsp/article/view/3177210.1590/S0034-89102004000500002Revista de Saúde Pública; Vol. 38 No. 5 (2004); 623-629 Revista de Saúde Pública; Vol. 38 Núm. 5 (2004); 623-629 Revista de Saúde Pública; v. 38 n. 5 (2004); 623-629 1518-87870034-8910reponame:Revista de Saúde Públicainstname:Universidade de São Paulo (USP)instacron:USPporenghttps://www.revistas.usp.br/rsp/article/view/31772/33693https://www.revistas.usp.br/rsp/article/view/31772/33694Copyright (c) 2017 Revista de Saúde Públicainfo:eu-repo/semantics/openAccessCarvalho, Maria do Socorro Laurentino deCaldas, Eloísa DutraDegallier, NicolasVilarinhos, Paulo de Tarso RibeiroSouza, Luís César Kenupp Rodrigues deYoshizawa, Maria Amélia CavalcantiKnox, Monique BrittoOliveira, Cristiane de2012-07-08T22:09:51Zoai:revistas.usp.br:article/31772Revistahttps://www.revistas.usp.br/rsp/indexONGhttps://www.revistas.usp.br/rsp/oairevsp@org.usp.br||revsp1@usp.br1518-87870034-8910opendoar:2012-07-08T22:09:51Revista de Saúde Pública - Universidade de São Paulo (USP)false |
dc.title.none.fl_str_mv |
Susceptibility of Aedes aegypti larvae to the insecticide temephos in the Federal District, Brazil Suscetibilidade de larvas de Aedes aegypti ao inseticida temefós no Distrito Federal |
title |
Susceptibility of Aedes aegypti larvae to the insecticide temephos in the Federal District, Brazil |
spellingShingle |
Susceptibility of Aedes aegypti larvae to the insecticide temephos in the Federal District, Brazil Carvalho, Maria do Socorro Laurentino de Aedes Temefós Resistência a inseticidas Controle de vetores Insetos vetores Aedes Temephos Insecticide resistance Vector control Insect vectors |
title_short |
Susceptibility of Aedes aegypti larvae to the insecticide temephos in the Federal District, Brazil |
title_full |
Susceptibility of Aedes aegypti larvae to the insecticide temephos in the Federal District, Brazil |
title_fullStr |
Susceptibility of Aedes aegypti larvae to the insecticide temephos in the Federal District, Brazil |
title_full_unstemmed |
Susceptibility of Aedes aegypti larvae to the insecticide temephos in the Federal District, Brazil |
title_sort |
Susceptibility of Aedes aegypti larvae to the insecticide temephos in the Federal District, Brazil |
author |
Carvalho, Maria do Socorro Laurentino de |
author_facet |
Carvalho, Maria do Socorro Laurentino de Caldas, Eloísa Dutra Degallier, Nicolas Vilarinhos, Paulo de Tarso Ribeiro Souza, Luís César Kenupp Rodrigues de Yoshizawa, Maria Amélia Cavalcanti Knox, Monique Britto Oliveira, Cristiane de |
author_role |
author |
author2 |
Caldas, Eloísa Dutra Degallier, Nicolas Vilarinhos, Paulo de Tarso Ribeiro Souza, Luís César Kenupp Rodrigues de Yoshizawa, Maria Amélia Cavalcanti Knox, Monique Britto Oliveira, Cristiane de |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
Carvalho, Maria do Socorro Laurentino de Caldas, Eloísa Dutra Degallier, Nicolas Vilarinhos, Paulo de Tarso Ribeiro Souza, Luís César Kenupp Rodrigues de Yoshizawa, Maria Amélia Cavalcanti Knox, Monique Britto Oliveira, Cristiane de |
dc.subject.por.fl_str_mv |
Aedes Temefós Resistência a inseticidas Controle de vetores Insetos vetores Aedes Temephos Insecticide resistance Vector control Insect vectors |
topic |
Aedes Temefós Resistência a inseticidas Controle de vetores Insetos vetores Aedes Temephos Insecticide resistance Vector control Insect vectors |
description |
OBJECTIVE: To study the susceptibility status of Aedes aegypti to the organophosphate insecticide temephos. METHODS: Samples of Ae. aegypti larvae were obtained, using ovitraps, from eight cities of the Federal District, central Brazil, in 2000 and 2001. Larvae were submitted to the diagnostic dose of 0.012 mg/l temephos, as recommended by standard World Health Organization methodology. Field populations were tested in parallel with reference strains Rockefeller and DIVAL, from the Environmental Surveillance Directory (DIVAL) insectary. The concentration and purity of temephos solutions were verified by gas chromatography. Correlation calculations were performed using StatView - SAS Institute Inc., version 5. Student's t test was used for detecting differences in susceptibility, with significance levels of alpha=0.05. RESULTS: In 2000, Ae. aegypti larvae populations from Taguatinga, Guará, and Núcleo Bandeirante showed resistance to temephos, with mortality ranging from 54.1 to 63.4%. The populations from Gama, Planaltina, and Sobradinho showed altered levels of susceptibility (mortality ranging from 83.6 to 92.8%). The population from Ceilândia was the only susceptible one, with 98% mortality. In 2001, all populations tested were resistant (44.4 to 66.4% mortality). No significant correlation was found between the susceptibility of populations and the distance between the cities of origin, or the amount of insecticide applied in the years preceding the study. CONCLUSIONS: Ae. aegypti susceptibility to temephos is changing in the Federal District. It is essential to continue monitoring the resistance of this vector to insecticides in order to ensure the efficiency of programs aimed at vector control and at the protection of human health. |
publishDate |
2004 |
dc.date.none.fl_str_mv |
2004-10-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://www.revistas.usp.br/rsp/article/view/31772 10.1590/S0034-89102004000500002 |
url |
https://www.revistas.usp.br/rsp/article/view/31772 |
identifier_str_mv |
10.1590/S0034-89102004000500002 |
dc.language.iso.fl_str_mv |
por eng |
language |
por eng |
dc.relation.none.fl_str_mv |
https://www.revistas.usp.br/rsp/article/view/31772/33693 https://www.revistas.usp.br/rsp/article/view/31772/33694 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2017 Revista de Saúde Pública info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2017 Revista de Saúde Pública |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Universidade de São Paulo. Faculdade de Saúde Pública |
publisher.none.fl_str_mv |
Universidade de São Paulo. Faculdade de Saúde Pública |
dc.source.none.fl_str_mv |
Revista de Saúde Pública; Vol. 38 No. 5 (2004); 623-629 Revista de Saúde Pública; Vol. 38 Núm. 5 (2004); 623-629 Revista de Saúde Pública; v. 38 n. 5 (2004); 623-629 1518-8787 0034-8910 reponame:Revista de Saúde Pública instname:Universidade de São Paulo (USP) instacron:USP |
instname_str |
Universidade de São Paulo (USP) |
instacron_str |
USP |
institution |
USP |
reponame_str |
Revista de Saúde Pública |
collection |
Revista de Saúde Pública |
repository.name.fl_str_mv |
Revista de Saúde Pública - Universidade de São Paulo (USP) |
repository.mail.fl_str_mv |
revsp@org.usp.br||revsp1@usp.br |
_version_ |
1800221782316154880 |