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Resistance and virulence distribution in enterococci isolated from broilers reared in two farming systems

2021-08-20Artigo científico Acesso aberto
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dc.contributor.authorSemedo-Lemsaddek, Teresa
dc.contributor.authorCota, João
dc.contributor.authorRibeiro, Tânia
dc.contributor.authorPimentel, Amélia
dc.contributor.authorTavares, Luis
dc.contributor.authorBernardo, Fernando
dc.contributor.authorOliveira, Manuela
dc.date.accessioned2021-11-03T12:26:06Z
dc.date.available2021-11-03T12:26:06Z
dc.date.issued2021-08-20
dc.descriptionResearch Areas: Veterinary Sciencespt_PT
dc.description.abstractBackground: The impact of enterococci in human health has been growing for the last decades, mainly due to their resistance to several antimicrobial agents. Human consumption of contaminated meat, especially poultry, has been identified as a possible route of transmission. The aim of the present study was to evaluate and compare the antimicrobial resistance profiles and virulence genes of enterococci isolated from Portuguese conventional and free-range broiler farms. Results: Antibiotic susceptibility testing showed high frequencies of resistance to tetracycline in both farming systems. Resistance to erythromycin and gentamicin were detected in about half of the isolates. Resistance to penicillin was the less frequently observed and no vancomycin resistant isolates were identified. The majority of the enterococcal isolates, from either farming systems, were resistant to more than one antibiotic, and no statistical associations were found, except for penicillin resistance which associated with the genetic clusters. No differences were found between farming systems regarding the prevalence of tet(M), erm(B), aac (6′)-Ie-aph (2″)-Ia and pbp5 genes, nevertheless pbp5 prevalence was associated with the different genetic clusters. Hemolytic activity was identified in 26.47% of all isolates and gelatinase activity in 50%. The gelE gene was identified in the majority of the isolates, whereas esp and agg genes were rarely detected. The cylA determinant was not detected in any of the isolates. Conclusions: Overall, results suggest that similar resistance patterns and virulence genes can be found in both farming systems, though enterococci in free-range conditions should be less prone to acquire further resistance genes.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationSemedo-Lemsaddek T, Cota JB, Ribeiro T, Pimentel A, Tavares L, Bernardo F Oliveira M. 2021. Resistance and virulence distribution in enterococci isolated from broilers reared in two farming systems. Irish Veterinary Journal 74(1):22. DOI:10.1186/s13620-021-00201-6pt_PT
dc.identifier.doi10.1186/s13620-021-00201-6pt_PT
dc.identifier.eissn2046-0481
dc.identifier.issn0368-0762
dc.identifier.urihttp://hdl.handle.net/10400.5/22473
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherBMCpt_PT
dc.relationDL57/2016/CP1438/CT0004pt_PT
dc.relation.publisherversionhttps://irishvetjournal.biomedcentral.com/track/pdf/10.1186/s13620-021-00201-6.pdfpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectAntimicrobial resistancept_PT
dc.subjectEnterococcuspt_PT
dc.subjectBroilerspt_PT
dc.subjectResistance genespt_PT
dc.subjectVirulence genespt_PT
dc.subjectFarming systempt_PT
dc.titleResistance and virulence distribution in enterococci isolated from broilers reared in two farming systemspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardNumber157379
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/157379/PT
oaire.citation.conferencePlaceENGLANDpt_PT
oaire.citation.issue22pt_PT
oaire.citation.titleIrish Veterinary Journalpt_PT
oaire.citation.volume74(1)pt_PT
oaire.fundingStream6817 - DCRRNI ID
person.familyNameSemedo-Lemsaddek
person.familyNameBettencourt Barcelos Cota
person.familyNameMorgado Tavares
person.familyNameOliveira
person.givenNameTeresa
person.givenNameJoão
person.givenNameLuis Manuel
person.givenNameManuela
person.identifier.ciencia-idA819-03CE-B03E
person.identifier.ciencia-idE51C-30A8-DEC8
person.identifier.ciencia-id9011-18C6-482D
person.identifier.ciencia-idBE1E-2B3B-92D2
person.identifier.orcid0000-0002-8349-3802
person.identifier.orcid0000-0002-9756-7913
person.identifier.orcid0000-0001-8671-6285
person.identifier.orcid0000-0002-3910-1525
person.identifier.ridJ-3010-2013
person.identifier.scopus-author-id25926127100
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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