Distribution of saa gene variants in verocytotoxigenic Escherichia coli isolated from cattle and food

Autores
Lucchesi, Paula Maria Alejandra; Krüger, Alejandra; Parma, Alberto Ernesto
Año de publicación
2006
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The pathogenesis of verocytotoxigenic Escherichia coli (VTEC) infection in humans is multifactorial, given that verocytotoxins are the principal virulence factor. Most strains causing serious diseases possess the eae gene that encodes the adhesin intimin, but its presence is not essential for virulence as some cases are caused by eae-negative strains. An autoagglutinating adhesin designated Saa was found in some eae-negative strains. This protein varies in size as a consequence of variation in the number of copies of a 37-aa repeat unit in the C-terminal region. Based on these findings, we designed PCR primers to amplify the region coding for these differences to detect saa gene variants present in VTEC strains isolated in Argentina from cattle and meat. The gene saa was detected in 36 (31.6%) eae-negative strains and 5 variants were found. Strains isolated from cattle possessed 4 saa variants, whereas 2 variants were present in isolates from meat. Saa variant 1 predominated (18 strains) and was distributed in strains isolated both from cattle and from meat. Our study revealed the existence of two novel saa variants, termed 4 and 5, which have a higher number of 111-bp repeats than saa genes previously studied.
Fil: Lucchesi, Paula Maria Alejandra. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Veterinarias. Departamento de Sanidad Animal y Medicina Preventiva; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil; Argentina
Fil: Krüger, Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil; Argentina. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Veterinarias. Departamento de Sanidad Animal y Medicina Preventiva; Argentina
Fil: Parma, Alberto Ernesto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil; Argentina. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Veterinarias. Departamento de Sanidad Animal y Medicina Preventiva; Argentina
Materia
Verocytotoxigenic Escherichia coli
STEC autoagglutinating adhesin
variants
virulence factors
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/111730
Acceder
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Distribution of saa gene variants in verocytotoxigenic Escherichia coli isolated from cattle and foodLucchesi, Paula Maria AlejandraKrüger, AlejandraParma, Alberto ErnestoVerocytotoxigenic Escherichia coliSTEC autoagglutinating adhesinvariantsvirulence factorshttps://purl.org/becyt/ford/4.3https://purl.org/becyt/ford/4The pathogenesis of verocytotoxigenic Escherichia coli (VTEC) infection in humans is multifactorial, given that verocytotoxins are the principal virulence factor. Most strains causing serious diseases possess the eae gene that encodes the adhesin intimin, but its presence is not essential for virulence as some cases are caused by eae-negative strains. An autoagglutinating adhesin designated Saa was found in some eae-negative strains. This protein varies in size as a consequence of variation in the number of copies of a 37-aa repeat unit in the C-terminal region. Based on these findings, we designed PCR primers to amplify the region coding for these differences to detect saa gene variants present in VTEC strains isolated in Argentina from cattle and meat. The gene saa was detected in 36 (31.6%) eae-negative strains and 5 variants were found. Strains isolated from cattle possessed 4 saa variants, whereas 2 variants were present in isolates from meat. Saa variant 1 predominated (18 strains) and was distributed in strains isolated both from cattle and from meat. Our study revealed the existence of two novel saa variants, termed 4 and 5, which have a higher number of 111-bp repeats than saa genes previously studied.Fil: Lucchesi, Paula Maria Alejandra. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Veterinarias. Departamento de Sanidad Animal y Medicina Preventiva; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil; ArgentinaFil: Krüger, Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil; Argentina. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Veterinarias. Departamento de Sanidad Animal y Medicina Preventiva; ArgentinaFil: Parma, Alberto Ernesto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil; Argentina. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Veterinarias. Departamento de Sanidad Animal y Medicina Preventiva; ArgentinaElsevier Science2006-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/111730Lucchesi, Paula Maria Alejandra; Krüger, Alejandra; Parma, Alberto Ernesto; Distribution of saa gene variants in verocytotoxigenic Escherichia coli isolated from cattle and food; Elsevier Science; Research In Microbiology; 157; 3; 4-2006; 263-2660923-2508CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0923250805001646info:eu-repo/semantics/altIdentifier/doi/10.1016/j.resmic.2005.07.002info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:38:08Zoai:ri.conicet.gov.ar:11336/111730instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 11:38:08.373CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Distribution of saa gene variants in verocytotoxigenic Escherichia coli isolated from cattle and food
title Distribution of saa gene variants in verocytotoxigenic Escherichia coli isolated from cattle and food
spellingShingle Distribution of saa gene variants in verocytotoxigenic Escherichia coli isolated from cattle and food
Lucchesi, Paula Maria Alejandra
Verocytotoxigenic Escherichia coli
STEC autoagglutinating adhesin
variants
virulence factors
title_short Distribution of saa gene variants in verocytotoxigenic Escherichia coli isolated from cattle and food
title_full Distribution of saa gene variants in verocytotoxigenic Escherichia coli isolated from cattle and food
title_fullStr Distribution of saa gene variants in verocytotoxigenic Escherichia coli isolated from cattle and food
title_full_unstemmed Distribution of saa gene variants in verocytotoxigenic Escherichia coli isolated from cattle and food
title_sort Distribution of saa gene variants in verocytotoxigenic Escherichia coli isolated from cattle and food
dc.creator.none.fl_str_mv Lucchesi, Paula Maria Alejandra
Krüger, Alejandra
Parma, Alberto Ernesto
author Lucchesi, Paula Maria Alejandra
author_facet Lucchesi, Paula Maria Alejandra
Krüger, Alejandra
Parma, Alberto Ernesto
author_role author
author2 Krüger, Alejandra
Parma, Alberto Ernesto
author2_role author
author
dc.subject.none.fl_str_mv Verocytotoxigenic Escherichia coli
STEC autoagglutinating adhesin
variants
virulence factors
topic Verocytotoxigenic Escherichia coli
STEC autoagglutinating adhesin
variants
virulence factors
purl_subject.fl_str_mv https://purl.org/becyt/ford/4.3
https://purl.org/becyt/ford/4
dc.description.none.fl_txt_mv The pathogenesis of verocytotoxigenic Escherichia coli (VTEC) infection in humans is multifactorial, given that verocytotoxins are the principal virulence factor. Most strains causing serious diseases possess the eae gene that encodes the adhesin intimin, but its presence is not essential for virulence as some cases are caused by eae-negative strains. An autoagglutinating adhesin designated Saa was found in some eae-negative strains. This protein varies in size as a consequence of variation in the number of copies of a 37-aa repeat unit in the C-terminal region. Based on these findings, we designed PCR primers to amplify the region coding for these differences to detect saa gene variants present in VTEC strains isolated in Argentina from cattle and meat. The gene saa was detected in 36 (31.6%) eae-negative strains and 5 variants were found. Strains isolated from cattle possessed 4 saa variants, whereas 2 variants were present in isolates from meat. Saa variant 1 predominated (18 strains) and was distributed in strains isolated both from cattle and from meat. Our study revealed the existence of two novel saa variants, termed 4 and 5, which have a higher number of 111-bp repeats than saa genes previously studied.
Fil: Lucchesi, Paula Maria Alejandra. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Veterinarias. Departamento de Sanidad Animal y Medicina Preventiva; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil; Argentina
Fil: Krüger, Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil; Argentina. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Veterinarias. Departamento de Sanidad Animal y Medicina Preventiva; Argentina
Fil: Parma, Alberto Ernesto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil; Argentina. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Veterinarias. Departamento de Sanidad Animal y Medicina Preventiva; Argentina
description The pathogenesis of verocytotoxigenic Escherichia coli (VTEC) infection in humans is multifactorial, given that verocytotoxins are the principal virulence factor. Most strains causing serious diseases possess the eae gene that encodes the adhesin intimin, but its presence is not essential for virulence as some cases are caused by eae-negative strains. An autoagglutinating adhesin designated Saa was found in some eae-negative strains. This protein varies in size as a consequence of variation in the number of copies of a 37-aa repeat unit in the C-terminal region. Based on these findings, we designed PCR primers to amplify the region coding for these differences to detect saa gene variants present in VTEC strains isolated in Argentina from cattle and meat. The gene saa was detected in 36 (31.6%) eae-negative strains and 5 variants were found. Strains isolated from cattle possessed 4 saa variants, whereas 2 variants were present in isolates from meat. Saa variant 1 predominated (18 strains) and was distributed in strains isolated both from cattle and from meat. Our study revealed the existence of two novel saa variants, termed 4 and 5, which have a higher number of 111-bp repeats than saa genes previously studied.
publishDate 2006
dc.date.none.fl_str_mv 2006-04
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/111730
Lucchesi, Paula Maria Alejandra; Krüger, Alejandra; Parma, Alberto Ernesto; Distribution of saa gene variants in verocytotoxigenic Escherichia coli isolated from cattle and food; Elsevier Science; Research In Microbiology; 157; 3; 4-2006; 263-266
0923-2508
CONICET Digital
CONICET
url http://hdl.handle.net/11336/111730
identifier_str_mv Lucchesi, Paula Maria Alejandra; Krüger, Alejandra; Parma, Alberto Ernesto; Distribution of saa gene variants in verocytotoxigenic Escherichia coli isolated from cattle and food; Elsevier Science; Research In Microbiology; 157; 3; 4-2006; 263-266
0923-2508
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0923250805001646
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.resmic.2005.07.002
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.982451

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