Distribution of the stx1 and stx2 genes in Escherichia coli isolated from milk cattle according to season, age, and production scale in southwestern region of Goias, Brazil

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dc.contributor.authorFerreira, M. R. A.
dc.contributor.authorStella, A. E.
dc.contributor.authorFreitas-Filho, E. G.
dc.contributor.authorSilva, T. S.
dc.contributor.authorNascimento, K. A. [UNESP]
dc.contributor.authorPinto, J. F. N.
dc.contributor.authorDias, M.
dc.contributor.authorMoreira, C. N.
dc.contributor.institutionUniversidade Federal de Goiás (UFG)
dc.contributor.institutionUniv Fed Pelotas
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2019-10-04T18:54:14Z
dc.date.available2019-10-04T18:54:14Z
dc.date.issued2018-11-01
dc.description.abstractThis study determined the distribution of stx1 and stx2 genes in Escherichia coli isolated from dairy herds with regard to animal age, season, and farm production-scale, and analyzed the phylogenetic distribution of the groups A, B1, B2, and D of 276 isolates of bovine feces Shiga toxin-producing E. coli (STEC). The stx1 profile was the most common, detected in 20.4% (202/990) of the isolates, followed by stx2 (4.54%, 45/990) and stx1+stx2 (2.92%, 29/990). The stx1 gene was detected more frequently in calves than in adult animals. In the dry season (winter), the presence of stx1+stx2 profile in cattle feces was higher than in the rainy season (summer), while no significant changes were observed between seasons for the stx1 and stx2 profiles. The most predominant phylogenetic groups in adult animals were B1, A, and D, while groups A and B1 prevailed in calves. Our data highlight the importance of identifying STEC reservoirs, since 7.5% of the tested isolates were positive for stx2, the main profile responsible for the hemolytic-uremic syndrome (HUS). Moreover, these microorganisms are adapted to survive even in hostile environments and can contaminate the food production chain, posing a significant risk to consumers of animal products.en
dc.description.affiliationUniv Fed Goias, Jatai, GO, Brazil
dc.description.affiliationUniv Fed Pelotas, Pelotas, RS, Brazil
dc.description.affiliationUniv Sao Paulo, Sao Paulo, SP, Brazil
dc.description.affiliationUniv Estadual Paulista, Jaboticabal, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Jaboticabal, SP, Brazil
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipIdCNPq: 503886/2009-2
dc.format.extent1807-1813
dc.identifierhttp://dx.doi.org/10.1590/1678-4162-9861
dc.identifier.citationArquivo Brasileiro De Medicina Veterinaria E Zootecnia. Minas Gerais: Arquivo Brasileiro Medicina Veterinaria Zootecnia, v. 70, n. 6, p. 1807-1813, 2018.
dc.identifier.doi10.1590/1678-4162-9861
dc.identifier.fileS0102-09352018000601807.pdf
dc.identifier.issn0102-0935
dc.identifier.scieloS0102-09352018000601807
dc.identifier.urihttp://hdl.handle.net/11449/186332
dc.identifier.wosWOS:000452984200020
dc.language.isoeng
dc.publisherArquivo Brasileiro Medicina Veterinaria Zootecnia
dc.relation.ispartofArquivo Brasileiro De Medicina Veterinaria E Zootecnia
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectShiga toxin-producing Escherichia coli (STEC)
dc.subjectphylogenetic STEC groups
dc.subjectSTEC reservoirs
dc.subjectStx1
dc.subjectStx2
dc.titleDistribution of the stx1 and stx2 genes in Escherichia coli isolated from milk cattle according to season, age, and production scale in southwestern region of Goias, Brazilen
dc.typeArtigo
dcterms.rightsHolderArquivo Brasileiro Medicina Veterinaria Zootecnia

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