Resistance of Aedes aegypti to temephos and adaptive disadvantages
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...
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| Format: | Article |
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Universidade de São Paulo
2014-10-01
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| Series: | Revista de Saúde Pública |
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| Online Access: | http://www.scielosp.org/scielo.php?script=sci_arttext&pid=S0034-89102014000500775&lng=en&tlng=en |
| _version_ | 1811297911969939456 |
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| author | Morgana Michele Cavalcanti de Souza Leal Diniz Alleksandra Dias da Silva Henriques Renata da Silva Leandro Dalvanice Leal Aguiar Eduardo Barbosa Beserra |
| author_facet | Morgana Michele Cavalcanti de Souza Leal Diniz Alleksandra Dias da Silva Henriques Renata da Silva Leandro Dalvanice Leal Aguiar Eduardo Barbosa Beserra |
| author_sort | Morgana Michele Cavalcanti de Souza Leal Diniz |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-04-13T06:12:10Z |
| format | Article |
| id | doaj.art-f5feea1ea69e43c5a86ce6069569eeab |
| institution | Directory Open Access Journal |
| issn | 0034-8910 |
| language | English |
| last_indexed | 2024-04-13T06:12:10Z |
| publishDate | 2014-10-01 |
| publisher | Universidade de São Paulo |
| record_format | Article |
| series | Revista de Saúde Pública |
| spelling | doaj.art-f5feea1ea69e43c5a86ce6069569eeab2022-12-22T02:59:00ZengUniversidade de São PauloRevista de Saúde Pública0034-89102014-10-0148577578210.1590/S0034-8910.2014048004649S0034-89102014000500775Resistance of Aedes aegypti to temephos and adaptive disadvantagesMorgana Michele Cavalcanti de Souza Leal DinizAlleksandra Dias da Silva HenriquesRenata da Silva LeandroDalvanice Leal AguiarEduardo Barbosa BeserraOBJECTIVE 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.http://www.scielosp.org/scielo.php?script=sci_arttext&pid=S0034-89102014000500775&lng=en&tlng=enAedes, crescimento & desenvolvimentoTemefós, toxicidadeResistência a InseticidasControle de InsetosDengue, prevenção & controle |
| spellingShingle | Morgana Michele Cavalcanti de Souza Leal Diniz Alleksandra Dias da Silva Henriques Renata da Silva Leandro Dalvanice Leal Aguiar Eduardo Barbosa Beserra Resistance of Aedes aegypti to temephos and adaptive disadvantages Revista de Saúde Pública Aedes, crescimento & desenvolvimento Temefós, toxicidade Resistência a Inseticidas Controle de Insetos Dengue, prevenção & controle |
| title | 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_short | Resistance of Aedes aegypti to temephos and adaptive disadvantages |
| title_sort | resistance of aedes aegypti to temephos and adaptive disadvantages |
| topic | Aedes, crescimento & desenvolvimento Temefós, toxicidade Resistência a Inseticidas Controle de Insetos Dengue, prevenção & controle |
| url | http://www.scielosp.org/scielo.php?script=sci_arttext&pid=S0034-89102014000500775&lng=en&tlng=en |
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