Genetic analysis of Escherichia coli strains carrying enteropathogenic Escherichia coli (EPEC) markers, isolated from children in Rio de Janeiro city, Brazil
Autor(a) principal: | |
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Data de Publicação: | 2003 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNIFESP |
Texto Completo: | http://dx.doi.org/10.1590/S1517-83822003000500013 http://repositorio.unifesp.br/handle/11600/1896 |
Resumo: | In the present study, 47 enteropathogenic Escherichia coli strains identified according to serotyping, presence of eae, bfp and EAF sequences, adherence phenotype and ability to induce attaching-effacing lesions were analyzed by pulsed-field gel electrophoresis (PFGE), multilocus enzyme electrophoresis (MLEE), and the presence of LEE genes (eae, espA, espB, tir) as well as the respective alleles. Amplification of LEE genes subtypes revealed 18 different pathotypes. Typing of the eae gene showed that most strains contained nontypable intimin (42%) followed by beta (35%), gamma and alpha genes (12% each). PFGE analysis revealed a variable degree of polymorphism among isolates and, in general, no clear correlation was observed among PFGE profiles and the virulence markers identified. Otherwise, grouping based on MLEE analysis showed a close association between eae allele and clonal cluster distribution leading us to indicate the eae profile as a promising marker to establish relatedness among such microorganisms. |
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Genetic analysis of Escherichia coli strains carrying enteropathogenic Escherichia coli (EPEC) markers, isolated from children in Rio de Janeiro city, BrazilAnálise genética de amostras de Escherichia coli carreadoras de marcadores da Escherichia coli Enteropatogênica (EPEC), isoladas de crianças na cidade do Rio de Janeiro, Brasilenteropathogenic Escherichia coligenetic diversityvirulence markersEscherichia coli enteropatogênicadiversidade genéticamarcadores de virulênciaIn the present study, 47 enteropathogenic Escherichia coli strains identified according to serotyping, presence of eae, bfp and EAF sequences, adherence phenotype and ability to induce attaching-effacing lesions were analyzed by pulsed-field gel electrophoresis (PFGE), multilocus enzyme electrophoresis (MLEE), and the presence of LEE genes (eae, espA, espB, tir) as well as the respective alleles. Amplification of LEE genes subtypes revealed 18 different pathotypes. Typing of the eae gene showed that most strains contained nontypable intimin (42%) followed by beta (35%), gamma and alpha genes (12% each). PFGE analysis revealed a variable degree of polymorphism among isolates and, in general, no clear correlation was observed among PFGE profiles and the virulence markers identified. Otherwise, grouping based on MLEE analysis showed a close association between eae allele and clonal cluster distribution leading us to indicate the eae profile as a promising marker to establish relatedness among such microorganisms.No presente estudo, 47 amostras enteropatogênicas de Escherichia coli, previamente caracterizadas pelo sorotipo, fenótipo de aderência, habilidade de induzir a formação da lesão histopatológica e presença das seqüências genéticas eae, bfp e EAF, foram analisadas de acordo com o perfil de fragmentação do DNA cromossômico pela técnica de eletroforese em campo pulsado (PFGE), as variantes isoenzimáticas através da eletroforese de isoenzimas (MLEE) e a presença de seqüências específicas da região LEE (eae, espA, espB, tir) e respectivos alelos. A amplificação destas seqüências mostrou a presença de 18 padrões genéticos distintos. A tipagem do gene eae revelou que a maior parte das amostras apresentou intimina não-tipável (42%) seguida dos tipos alélicos beta (35%), gama e alfa (12% cada). A fragmentação do DNA cromossômico detectou um elevado polimorfismo genético entre as amostras estudadas e não foi observada uma correlação com os marcadores de virulência investigados. Por outro lado, a análise das variantes isoenzimáticas sugeriu uma distribuição clonal específica de variantes genéticas do locus eae, o que nos leva a indicar a sua utilização como um marcador promissor para definir as relações genéticas neste grupo de microrganismos.Fundação Oswaldo CruzUniversidade Federal de São Paulo (UNIFESP)Universidade Estadual do Rio de JaneiroUniversidade Federal FluminenseInstituto Adolfo LutzUniversidade Federal do Rio de JaneiroUNIFESP, EPM, Sao Paulo, BrazilSciELOFundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ)Sociedade Brasileira de MicrobiologiaFundação Oswaldo CruzUniversidade Federal de São Paulo (UNIFESP)Universidade Estadual do Rio de JaneiroUniversidade Federal FluminenseInstituto Adolfo LutzUniversidade Federal do Rio de JaneiroRegua-Mangia, Adriana HamondGomes, Tania Aparecida Tardelli [UNIFESP]Andrade, João Ramos da CostaVieira, Mônica Aparecida Midolli [UNIFESP]Gonzalez, Alice Gonçalves MartinsZahner, VivianeIrino, KinueTeixeira, Lúcia Martins2015-06-14T13:30:10Z2015-06-14T13:30:10Z2003-11-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion38-41application/pdfhttp://dx.doi.org/10.1590/S1517-83822003000500013Brazilian Journal of Microbiology. Sociedade Brasileira de Microbiologia, v. 34, p. 38-41, 2003.10.1590/S1517-83822003000500013S1517-83822003000500013.pdf1517-8382S1517-83822003000500013http://repositorio.unifesp.br/handle/11600/1896WOS:000207065500013engBrazilian Journal of Microbiologyinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UNIFESPinstname:Universidade Federal de São Paulo (UNIFESP)instacron:UNIFESP2024-10-10T13:38:34Zoai:repositorio.unifesp.br/:11600/1896Repositório InstitucionalPUBhttp://www.repositorio.unifesp.br/oai/requestbiblioteca.csp@unifesp.bropendoar:34652024-10-10T13:38:34Repositório Institucional da UNIFESP - Universidade Federal de São Paulo (UNIFESP)false |
dc.title.none.fl_str_mv |
Genetic analysis of Escherichia coli strains carrying enteropathogenic Escherichia coli (EPEC) markers, isolated from children in Rio de Janeiro city, Brazil Análise genética de amostras de Escherichia coli carreadoras de marcadores da Escherichia coli Enteropatogênica (EPEC), isoladas de crianças na cidade do Rio de Janeiro, Brasil |
title |
Genetic analysis of Escherichia coli strains carrying enteropathogenic Escherichia coli (EPEC) markers, isolated from children in Rio de Janeiro city, Brazil |
spellingShingle |
Genetic analysis of Escherichia coli strains carrying enteropathogenic Escherichia coli (EPEC) markers, isolated from children in Rio de Janeiro city, Brazil Regua-Mangia, Adriana Hamond enteropathogenic Escherichia coli genetic diversity virulence markers Escherichia coli enteropatogênica diversidade genética marcadores de virulência |
title_short |
Genetic analysis of Escherichia coli strains carrying enteropathogenic Escherichia coli (EPEC) markers, isolated from children in Rio de Janeiro city, Brazil |
title_full |
Genetic analysis of Escherichia coli strains carrying enteropathogenic Escherichia coli (EPEC) markers, isolated from children in Rio de Janeiro city, Brazil |
title_fullStr |
Genetic analysis of Escherichia coli strains carrying enteropathogenic Escherichia coli (EPEC) markers, isolated from children in Rio de Janeiro city, Brazil |
title_full_unstemmed |
Genetic analysis of Escherichia coli strains carrying enteropathogenic Escherichia coli (EPEC) markers, isolated from children in Rio de Janeiro city, Brazil |
title_sort |
Genetic analysis of Escherichia coli strains carrying enteropathogenic Escherichia coli (EPEC) markers, isolated from children in Rio de Janeiro city, Brazil |
author |
Regua-Mangia, Adriana Hamond |
author_facet |
Regua-Mangia, Adriana Hamond Gomes, Tania Aparecida Tardelli [UNIFESP] Andrade, João Ramos da Costa Vieira, Mônica Aparecida Midolli [UNIFESP] Gonzalez, Alice Gonçalves Martins Zahner, Viviane Irino, Kinue Teixeira, Lúcia Martins |
author_role |
author |
author2 |
Gomes, Tania Aparecida Tardelli [UNIFESP] Andrade, João Ramos da Costa Vieira, Mônica Aparecida Midolli [UNIFESP] Gonzalez, Alice Gonçalves Martins Zahner, Viviane Irino, Kinue Teixeira, Lúcia Martins |
author2_role |
author author author author author author author |
dc.contributor.none.fl_str_mv |
Fundação Oswaldo Cruz Universidade Federal de São Paulo (UNIFESP) Universidade Estadual do Rio de Janeiro Universidade Federal Fluminense Instituto Adolfo Lutz Universidade Federal do Rio de Janeiro |
dc.contributor.author.fl_str_mv |
Regua-Mangia, Adriana Hamond Gomes, Tania Aparecida Tardelli [UNIFESP] Andrade, João Ramos da Costa Vieira, Mônica Aparecida Midolli [UNIFESP] Gonzalez, Alice Gonçalves Martins Zahner, Viviane Irino, Kinue Teixeira, Lúcia Martins |
dc.subject.por.fl_str_mv |
enteropathogenic Escherichia coli genetic diversity virulence markers Escherichia coli enteropatogênica diversidade genética marcadores de virulência |
topic |
enteropathogenic Escherichia coli genetic diversity virulence markers Escherichia coli enteropatogênica diversidade genética marcadores de virulência |
description |
In the present study, 47 enteropathogenic Escherichia coli strains identified according to serotyping, presence of eae, bfp and EAF sequences, adherence phenotype and ability to induce attaching-effacing lesions were analyzed by pulsed-field gel electrophoresis (PFGE), multilocus enzyme electrophoresis (MLEE), and the presence of LEE genes (eae, espA, espB, tir) as well as the respective alleles. Amplification of LEE genes subtypes revealed 18 different pathotypes. Typing of the eae gene showed that most strains contained nontypable intimin (42%) followed by beta (35%), gamma and alpha genes (12% each). PFGE analysis revealed a variable degree of polymorphism among isolates and, in general, no clear correlation was observed among PFGE profiles and the virulence markers identified. Otherwise, grouping based on MLEE analysis showed a close association between eae allele and clonal cluster distribution leading us to indicate the eae profile as a promising marker to establish relatedness among such microorganisms. |
publishDate |
2003 |
dc.date.none.fl_str_mv |
2003-11-01 2015-06-14T13:30:10Z 2015-06-14T13:30:10Z |
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://dx.doi.org/10.1590/S1517-83822003000500013 Brazilian Journal of Microbiology. Sociedade Brasileira de Microbiologia, v. 34, p. 38-41, 2003. 10.1590/S1517-83822003000500013 S1517-83822003000500013.pdf 1517-8382 S1517-83822003000500013 http://repositorio.unifesp.br/handle/11600/1896 WOS:000207065500013 |
url |
http://dx.doi.org/10.1590/S1517-83822003000500013 http://repositorio.unifesp.br/handle/11600/1896 |
identifier_str_mv |
Brazilian Journal of Microbiology. Sociedade Brasileira de Microbiologia, v. 34, p. 38-41, 2003. 10.1590/S1517-83822003000500013 S1517-83822003000500013.pdf 1517-8382 S1517-83822003000500013 WOS:000207065500013 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Brazilian Journal of Microbiology |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
38-41 application/pdf |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Microbiologia |
publisher.none.fl_str_mv |
Sociedade Brasileira de Microbiologia |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UNIFESP instname:Universidade Federal de São Paulo (UNIFESP) instacron:UNIFESP |
instname_str |
Universidade Federal de São Paulo (UNIFESP) |
instacron_str |
UNIFESP |
institution |
UNIFESP |
reponame_str |
Repositório Institucional da UNIFESP |
collection |
Repositório Institucional da UNIFESP |
repository.name.fl_str_mv |
Repositório Institucional da UNIFESP - Universidade Federal de São Paulo (UNIFESP) |
repository.mail.fl_str_mv |
biblioteca.csp@unifesp.br |
_version_ |
1814268450603794432 |