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The aims of the research reported here were to identify potential risk factors associated with the presence of Staphylococcus aureus intramammary infection (IMI) in pre partum dairy heifers on 17 dairy farms from three provinces of Argentina and to characterize, at molecular level, isolates from those heifers and lactating cows from two selected herds. A total of 1474 heifers and 4878 lactating cows were studied. The prevalence of Staphylococcus aureus [ver mas...]
dc.contributor.authorCamussone, Cecilia
dc.contributor.authorMolineri, Ana Ines
dc.contributor.authorSignorini, Marcelo
dc.contributor.authorNeder, Veronica Elizabeth
dc.contributor.authorVitulich, Carlos Alberto
dc.contributor.authorCalvinho, Luis Fernando
dc.date.accessioned2020-04-02T12:29:44Z
dc.date.available2020-04-02T12:29:44Z
dc.date.issued2020-02
dc.identifier.issn0022-0299
dc.identifier.issn1469-7629 (Online)
dc.identifier.other
dc.identifier.otherhttps://doi.org/10.1017/S0022029919001018
dc.identifier.urihttp://hdl.handle.net/20.500.12123/7022
dc.description.abstractThe aims of the research reported here were to identify potential risk factors associated with the presence of Staphylococcus aureus intramammary infection (IMI) in pre partum dairy heifers on 17 dairy farms from three provinces of Argentina and to characterize, at molecular level, isolates from those heifers and lactating cows from two selected herds. A total of 1474 heifers and 4878 lactating cows were studied. The prevalence of Staphylococcus aureus IMI in the heifers, heifers at quarter level and lactating cow mammary quarters was 14.41, 4.82, and 14.65%, respectively. Univariate analysis showed the key variables associated with S. aureus IMI presence in the heifers were: S. aureus IMI prevalence in cows of the lactating herd, the time calves stayed with their dam after birth, the calf rearing system, the place of rearing (own farm or other dairy farm) and fly control on the farm. None of the variables included in the multivariable analysis was associated with the presence of S. aureus IMI in the pre partum heifers, probably due to low variability among management practices used by the farms for rearing the heifer calves. At the molecular level, S. aureus isolates were grouped into three main PFGE clusters and several genotypes within the clusters. Isolates from mammary secretion of pre partum heifers and milk of lactating cows comprised different PFGE clusters in both herds, although two exceptions occurred. The absence of gene fnbpB, which codifies for a virulence factor protein involved in cell invasion by S. aureus, was significantly more frequent in pre partum heifer secretion isolates than in isolates from lactating cow milk. These results suggest that, under these management conditions, isolates from mammary secretions of pre partum heifers do not originate from the milk of lactating cows, but rather other sources to which the heifer is exposed.es_AR
dc.formatapplication/pdfeng
dc.language.isoeng
dc.publisherCambridge University Presses_AR
dc.rightsinfo:eu-repo/semantics/restrictedAccesseng
dc.sourceJournal of dairy research 87 (1) : 82-88. (February 2020)es_AR
dc.subjectVacas Lecherases_AR
dc.subjectDairy Cowseng
dc.subjectHeiferseng
dc.subjectNovillaes_AR
dc.subjectRisk Factorseng
dc.subjectFactores de Riesgoes_AR
dc.subjectStaphylococcus Aureuseng
dc.subjectBiología Moleculares_AR
dc.subjectMolecular Biologyeng
dc.subject.otherIntramammary Infectioneng
dc.subject.otherInfección Intramamariaes_AR
dc.subject.otherMolecular Characterizationeng
dc.subject.otherCaracterización Moleculares_AR
dc.titleRisk factors of S. aureus intramammary infection in pre partum dairy heifers under grazing conditions and molecular characterization of isolates from heifers and cowseng
dc.typeinfo:ar-repo/semantics/artículoes_AR
dc.typeinfo:eu-repo/semantics/articleeng
dc.typeinfo:eu-repo/semantics/publishedVersioneng
dc.description.origenEEA Rafaelaes_AR
dc.description.filFil: Camussone, Cecilia. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.es_AR
dc.description.filFil: Molineri, Ana Ines. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.es_AR
dc.description.filFil: Signorini, Marcelo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.es_AR
dc.description.filFil: Neder, Veronica Elizabeth. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; Argentina.es_AR
dc.description.filFil: Vitulich, Carlos Alberto. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; Argentina.es_AR
dc.description.filFil: Calvinho, Luis Fernando. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; Argentina.es_AR
dc.subtypecientifico


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