Risk factors of S. aureus intramammary infection in pre partum dairy heifers under grazing conditions and molecular characterization of isolates from heifers and cows

dc.creatorCamussone, Cecilia María
dc.creatorMolineri, Ana Inés
dc.creatorSignorini Porchietto, Marcelo Lisandro
dc.creatorNeder, Veronica
dc.creatorVitulich, Carlos Alberto
dc.creatorCalvinho, Luis Fernando
dc.date2020-02
dc.date.accessioned2023-08-30T23:42:25Z
dc.date.available2023-08-30T23:42:25Z
dc.identifierhttp://hdl.handle.net/11336/174493
dc.identifierCamussone, Cecilia María; Molineri, Ana Inés; Signorini Porchietto, Marcelo Lisandro; Neder, Veronica; Vitulich, Carlos Alberto; et al.; Risk factors of S. aureus intramammary infection in pre partum dairy heifers under grazing conditions and molecular characterization of isolates from heifers and cows; Cambridge University Press; Journal of Dairy Research; 87; 1; 2-2020; 82-88
dc.identifier0022-0299
dc.identifier1469-7629
dc.identifierCONICET Digital
dc.identifierCONICET
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8542709
dc.descriptionThe 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.
dc.descriptionFil: Camussone, Cecilia María. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Santa Fe. Estación Experimental Agropecuaria Rafaela; Argentina
dc.descriptionFil: Molineri, Ana Inés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Santa Fe. Estación Experimental Agropecuaria Rafaela; Argentina
dc.descriptionFil: Signorini Porchietto, Marcelo Lisandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Santa Fe. Estación Experimental Agropecuaria Rafaela; Argentina
dc.descriptionFil: Neder, Veronica. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Santa Fe. Estación Experimental Agropecuaria Rafaela; Argentina
dc.descriptionFil: Vitulich, Carlos Alberto. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Santa Fe. Estación Experimental Agropecuaria Rafaela; Argentina
dc.descriptionFil: Calvinho, Luis Fernando. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Santa Fe. Estación Experimental Agropecuaria Rafaela; Argentina
dc.formatapplication/pdf
dc.formatapplication/pdf
dc.languageeng
dc.publisherCambridge University Press
dc.relationinfo:eu-repo/semantics/altIdentifier/doi/10.1017/S0022029919001018
dc.relationinfo:eu-repo/semantics/altIdentifier/url/https://www.cambridge.org/core/journals/journal-of-dairy-research/article/abs/risk-factors-of-s-aureus-intramammary-infection-in-pre-partum-dairy-heifers-under-grazing-conditions-and-molecular-characterization-of-isolates-from-heifers-and-cows/B90BFDAFECB9C39F66D61375DFC54EE0
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.rightshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subjectHEIFER INTRAMAMMARY INFECTION
dc.subjectHEIFERS
dc.subjectMOLECULAR CHARACTERIZATION
dc.subjectRISK FACTORS
dc.subjectS. AUREUS
dc.subjecthttps://purl.org/becyt/ford/4.3
dc.subjecthttps://purl.org/becyt/ford/4
dc.titleRisk factors of S. aureus intramammary infection in pre partum dairy heifers under grazing conditions and molecular characterization of isolates from heifers and cows
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:ar-repo/semantics/artículo
dc.typeinfo:eu-repo/semantics/publishedVersion


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