Prevalence, characterization, and genotypic analysis of Escherichia coli O157:H7/NM from selected beef exporting abattoirs of Argentina

dc.creatorMasana, Marcelo
dc.creatorLeotta, G. A.
dc.creatorDel Castillo, L. L.
dc.creatorD'Astek, Beatriz A
dc.creatorPalladino, Martin P
dc.creatorGalli, Lucía
dc.creatorVilacoba, E.
dc.creatorCarbonari, Carolina C
dc.creatorRodríguez, Alejandro H
dc.creatorRivas, Marta
dc.date2020-11-20T16:45:42Z
dc.date2020-11-20T16:45:42Z
dc.date2010-04
dc.date.accessioned2023-08-29T20:07:07Z
dc.date.available2023-08-29T20:07:07Z
dc.identifier0362-028X
dc.identifierhttp://sgc.anlis.gob.ar/handle/123456789/1699
dc.identifier10.4315/0362-028x-73.4.649
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8519498
dc.descriptionFil: Mosana, M. O. Instituto Tecnología de Alimentos, Centro de Investigación de Agroindustria, Instituto Nacional de Tecnología Agropecuaria, INTA, CC. 77, B1708WAB Morón, Pcia. de Buenos Aires; Argentina.
dc.descriptionFil: Leotta, G. A. ANLIS Dr.C.G.Malbrán. Instituto Nacional de Enfermedades Infecciosas. Servicio Fisiopatogenia; Argentina
dc.descriptionFil: Del Castillo, L.L. Instituto Tecnología de Alimentos, Centro de Investigación de Agroindustria, Instituto Nacional de Tecnología Agropecuaria, INTA, CC. 77, B1708WAB Morón, Pcia. de Buenos Aires; Argentina.
dc.descriptionFil: D´Astek, B. A. ANLIS Dr.C.G.Malbrán. Instituto Nacional de Enfermedades Infecciosas. Servicio Fisiopatogenia; Argentina.
dc.descriptionFil: Palladino, P.M. Instituto Tecnología de Alimentos, Centro de Investigación de Agroindustria, Instituto Nacional de Tecnología Agropecuaria, INTA, CC. 77, B1708WAB Morón, Pcia. de Buenos Aires; Argentina.
dc.descriptionFil: Galli, L. ANLIS Dr.C.G.Malbrán. Instituto Nacional de Enfermedades Infecciosas. Servicio Fisiopatogenia; Argentina.
dc.descriptionFil: Villacoba, E. ANLIS Dr.C.G.Malbrán. Instituto Nacional de Enfermedades Infecciosas. Servicio Fisiopatogenia; Argentina.
dc.descriptionFil: Carbonari, C. ANLIS Dr.C.G.Malbrán. Instituto Nacional de Enfermedades Infecciosas. Servicio Fisiopatogenia; Argentina.
dc.descriptionFil: Rodriguez, H. R. Instituto de Economía y Sociología, Instituto Nacional de Tecnología Agropeciaria, INTA, Buenos Aires; Argentina.
dc.descriptionFil: Rivas, M. ANLIS Dr.C.G.Malbrán. Instituto Nacional de Enfermedades Infecciosas. Servicio Fisiopatogenia; Argentina.
dc.descriptionIn Argentina, Escherichia coli O157:H7/NM (STEC O157) is the prevalent serotype associated with hemolytic uremic syndrome (HUS), which is endemic in the country with more than 400 cases per year. In order to estimate the prevalence and characteristics of STEC O157 in beef cattle at slaughter, a survey of 1,622 fecal and carcass samples was conducted in nine beef exporting abattoirs from November 2006 to April 2008. A total of 54 samples were found positive for STEC O157, with an average prevalence of 4.1% in fecal content and 2.6% in carcasses. Calves and heifers presented higher percentages of prevalence in feces, 10.5 and 8.5%, respectively. All STEC O157 isolates harbored stx(2) (Shiga toxin 2), eae (intimin), ehxA (enterohemolysin), and fliC(H7) (H7 flagellin) genes, while stx(1) (Shiga toxin 1) was present in 16.7% of the strains. The prevalent (56%) stx genotype identified was stx(2) combined with variant stx(2c (vh-a)), the combination of which is also prevalent (>90%) in STEC O157 post-enteric HUS cases in Argentina. The clonal relatedness of STEC O157 strains was established by phage typing and pulsed-field gel electrophoresis (PFGE). The 54 STEC isolates were categorized into 12 different phage types and in 29 XbaI-PFGE patterns distributed in 27 different lots. STEC O157 strains isolated from 5 of 21 carcasses were identical by PFGE (100% similarity) to strains of the fecal content of the same or a contiguous bovine in the lot. Five phage type-PFGE-stx profiles of 10 strains isolated in this study matched with the profiles of the strains recovered from 18 of 122 HUS cases that occurred in the same period.
dc.languageen
dc.publisherInternational Association for Food Protection
dc.relationJournal of food protection
dc.rightsnone
dc.subjectEscherichia coli
dc.subjectCarne Roja
dc.subjectArgentina
dc.titlePrevalence, characterization, and genotypic analysis of Escherichia coli O157:H7/NM from selected beef exporting abattoirs of Argentina
dc.typeArtículo


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