Resistance of Aedes aegypti to temephos and adaptive disadvantages

Detalhes bibliográficos
Autor(a) principal: Diniz,Morgana Michele Cavalcanti de Souza Leal
Data de Publicação: 2014
Outros Autores: Henriques,Alleksandra Dias da Silva, Leandro,Renata da Silva, Aguiar,Dalvanice Leal, Beserra,Eduardo Barbosa
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Revista de Saúde Pública
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0034-89102014000500775
Resumo: OBJECTIVE To evaluate the resistance of Aedes aegypti to temephos Fersol 1G (temephos 1% w/w) associated with the adaptive disadvantage of insect populations in the absence of selection pressure. METHODS A diagnostic dose of 0.28 mg a.i./L and doses between 0.28 mg a.i./L and 1.40 mg a.i./L were used. Vector populations collected between 2007 and 2008 in the city of Campina Grande, state of Paraíba, were evaluated. To evaluate competition in the absence of selection pressure, insect populations with initial frequencies of 20.0%, 40.0%, 60.0%, and 80.0% resistant individuals were produced and subjected to the diagnostic dose for two months. Evaluation of the development of aquatic and adult stages allowed comparison of the life cycles in susceptible and resistant populations and construction of fertility life tables. RESULTS No mortality was observed in Ae. aegypti populations subjected to the diagnostic dose of 0.28 mg a.i./L. The decreased mortality observed in populations containing 20.0%, 40.0%, 60.0%, and 80.0% resistant insects indicates that temephos resistance is unstable in the absence of selection pressure. A comparison of the life cycles indicated differences in the duration and viability of the larval phase, but no differences were observed in embryo development, sex ratio, adult longevity, and number of eggs per female. CONCLUSIONS The fertility life table results indicated that some populations had reproductive disadvantages compared with the susceptible population in the absence of selection pressure, indicating the presence of a fitness cost in populations resistant to temephos.
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spelling Resistance of Aedes aegypti to temephos and adaptive disadvantagesAedes, growth & developmentTemefos, toxicityInsecticide ResistanceInsect ControlDengue, prevention & control OBJECTIVE To evaluate the resistance of Aedes aegypti to temephos Fersol 1G (temephos 1% w/w) associated with the adaptive disadvantage of insect populations in the absence of selection pressure. METHODS A diagnostic dose of 0.28 mg a.i./L and doses between 0.28 mg a.i./L and 1.40 mg a.i./L were used. Vector populations collected between 2007 and 2008 in the city of Campina Grande, state of Paraíba, were evaluated. To evaluate competition in the absence of selection pressure, insect populations with initial frequencies of 20.0%, 40.0%, 60.0%, and 80.0% resistant individuals were produced and subjected to the diagnostic dose for two months. Evaluation of the development of aquatic and adult stages allowed comparison of the life cycles in susceptible and resistant populations and construction of fertility life tables. RESULTS No mortality was observed in Ae. aegypti populations subjected to the diagnostic dose of 0.28 mg a.i./L. The decreased mortality observed in populations containing 20.0%, 40.0%, 60.0%, and 80.0% resistant insects indicates that temephos resistance is unstable in the absence of selection pressure. A comparison of the life cycles indicated differences in the duration and viability of the larval phase, but no differences were observed in embryo development, sex ratio, adult longevity, and number of eggs per female. CONCLUSIONS The fertility life table results indicated that some populations had reproductive disadvantages compared with the susceptible population in the absence of selection pressure, indicating the presence of a fitness cost in populations resistant to temephos. Faculdade de Saúde Pública da Universidade de São Paulo2014-10-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0034-89102014000500775Revista de Saúde Pública v.48 n.5 2014reponame:Revista de Saúde Públicainstname:Universidade de São Paulo (USP)instacron:USP10.1590/S0034-8910.2014048004649info:eu-repo/semantics/openAccessDiniz,Morgana Michele Cavalcanti de Souza LealHenriques,Alleksandra Dias da SilvaLeandro,Renata da SilvaAguiar,Dalvanice LealBeserra,Eduardo Barbosaeng2014-10-27T00:00:00Zoai:scielo:S0034-89102014000500775Revistahttp://www.scielo.br/scielo.php?script=sci_serial&pid=0034-8910&lng=pt&nrm=isoONGhttps://old.scielo.br/oai/scielo-oai.phprevsp@org.usp.br||revsp1@usp.br1518-87870034-8910opendoar:2014-10-27T00:00Revista de Saúde Pública - Universidade de São Paulo (USP)false
dc.title.none.fl_str_mv Resistance of Aedes aegypti to temephos and adaptive disadvantages
title Resistance of Aedes aegypti to temephos and adaptive disadvantages
spellingShingle Resistance of Aedes aegypti to temephos and adaptive disadvantages
Diniz,Morgana Michele Cavalcanti de Souza Leal
Aedes, growth & development
Temefos, toxicity
Insecticide Resistance
Insect Control
Dengue, prevention & control
title_short Resistance of Aedes aegypti to temephos and adaptive disadvantages
title_full Resistance of Aedes aegypti to temephos and adaptive disadvantages
title_fullStr Resistance of Aedes aegypti to temephos and adaptive disadvantages
title_full_unstemmed Resistance of Aedes aegypti to temephos and adaptive disadvantages
title_sort Resistance of Aedes aegypti to temephos and adaptive disadvantages
author Diniz,Morgana Michele Cavalcanti de Souza Leal
author_facet Diniz,Morgana Michele Cavalcanti de Souza Leal
Henriques,Alleksandra Dias da Silva
Leandro,Renata da Silva
Aguiar,Dalvanice Leal
Beserra,Eduardo Barbosa
author_role author
author2 Henriques,Alleksandra Dias da Silva
Leandro,Renata da Silva
Aguiar,Dalvanice Leal
Beserra,Eduardo Barbosa
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Diniz,Morgana Michele Cavalcanti de Souza Leal
Henriques,Alleksandra Dias da Silva
Leandro,Renata da Silva
Aguiar,Dalvanice Leal
Beserra,Eduardo Barbosa
dc.subject.por.fl_str_mv Aedes, growth & development
Temefos, toxicity
Insecticide Resistance
Insect Control
Dengue, prevention & control
topic Aedes, growth & development
Temefos, toxicity
Insecticide Resistance
Insect Control
Dengue, prevention & control
description OBJECTIVE To evaluate the resistance of Aedes aegypti to temephos Fersol 1G (temephos 1% w/w) associated with the adaptive disadvantage of insect populations in the absence of selection pressure. METHODS A diagnostic dose of 0.28 mg a.i./L and doses between 0.28 mg a.i./L and 1.40 mg a.i./L were used. Vector populations collected between 2007 and 2008 in the city of Campina Grande, state of Paraíba, were evaluated. To evaluate competition in the absence of selection pressure, insect populations with initial frequencies of 20.0%, 40.0%, 60.0%, and 80.0% resistant individuals were produced and subjected to the diagnostic dose for two months. Evaluation of the development of aquatic and adult stages allowed comparison of the life cycles in susceptible and resistant populations and construction of fertility life tables. RESULTS No mortality was observed in Ae. aegypti populations subjected to the diagnostic dose of 0.28 mg a.i./L. The decreased mortality observed in populations containing 20.0%, 40.0%, 60.0%, and 80.0% resistant insects indicates that temephos resistance is unstable in the absence of selection pressure. A comparison of the life cycles indicated differences in the duration and viability of the larval phase, but no differences were observed in embryo development, sex ratio, adult longevity, and number of eggs per female. CONCLUSIONS The fertility life table results indicated that some populations had reproductive disadvantages compared with the susceptible population in the absence of selection pressure, indicating the presence of a fitness cost in populations resistant to temephos.
publishDate 2014
dc.date.none.fl_str_mv 2014-10-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0034-89102014000500775
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0034-89102014000500775
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0034-8910.2014048004649
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Faculdade de Saúde Pública da Universidade de São Paulo
publisher.none.fl_str_mv Faculdade de Saúde Pública da Universidade de São Paulo
dc.source.none.fl_str_mv Revista de Saúde Pública v.48 n.5 2014
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
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