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dc.creatorLeginagoikoa, Iratxees_ES
dc.creatorJuste, Ramónes_ES
dc.creatorBarandika, Jessees_ES
dc.creatorAmorena Zabalza, Beatrizes_ES
dc.creatorAndrés Cara, Damián dees_ES
dc.creatorLuján, Lluíses_ES
dc.creatorBadiola, Juan Josées_ES
dc.creatorBerriatua, Eduardoes_ES
dc.date.accessioned2018-12-28T09:13:59Z
dc.date.available2018-12-28T09:13:59Z
dc.date.issued2006
dc.identifier.issn0928-4249 (Print)
dc.identifier.issn1297-9716 (Electronic)
dc.identifier.urihttps://hdl.handle.net/2454/31872
dc.description.abstractMaedi-Visna Virus (MVV) seroprevalence and its relationship with housing and mode of rearing of replacement ewe-lambs was investigated in 38 non-randomly selected sheep-flocks in Spain. They included extensive lamb-producing Manchega cross-bred flocks raised almost permanently at pasture, semi-intensive Latxa dairy flocks housed 2–8 months/year and intensively raised Assaf dairy flocks housed most time and at higher stocking density in less ventilated buildings than other flocks. Most flocks raised replacement lambs naturally with their dams until weaning and as a separate flock thereafter until lambing at one year of age. Seroprevalence (95% confidence intervals) was 77%, 25% and 5% (4–6) in intensive, semi-intensive and extensive flocks, respectively and the median (interquartile range) flock-seroprevalence was 82% (66–94) in intensive flocks, 31% (14–31) in semi-intensive flocks and 4% (0–7) in extensive flocks. Seroprevalence was lowest in one year-old sheep and increased to flock levels during the year after introduction into the adult flock in most intensive flocks and more gradually in other flocks. Adult flock seroprevalence was associated with housing time but this relationship was not evident within a particular rearing system, indicating that other unknown factors are critical in horizontal MVV-transmission. Low seroprevalence in extensive flocks further supports previous indications that lactogenic MVV-infection is relatively inefficient and horizontal transmission is necessary to ensure long-term maintenance of MVV and this could explain that MVV has not been reported from countries with mainly extensively reared sheep such as Australia and New Zealand. Moreover, it indicates that MVV-control in extensive and semi-intensive flocks can be simple and inexpensive.en
dc.description.sponsorshipThis work was financially supported by grants AGL2003-08977-c03-03 of the Ministerio de Ciencia y Tecnología and SED2003011 and SED2005008 of the Departamento de Agricultura of the Basque Government.en
dc.format.extent12 p.
dc.format.mimetypeapplication/pdfen
dc.language.isoengen
dc.publisherEDP Sciencesen
dc.relation.ispartofVeterinary Research, 37 (2006) 767–778en
dc.rights© INRA, EDP Sciences, 2006en
dc.subjectMaedi-Visna virusen
dc.subjectSheepen
dc.subjectSeroprevalenceen
dc.subjectIntensive and extensive rearingen
dc.subjectSpainen
dc.titleExtensive rearing hinders Maedi-Visna Virus (MVV) infection in sheepen
dc.typeinfo:eu-repo/semantics/articleen
dc.typeArtículo / Artikuluaes
dc.contributor.departmentIdAB - Instituto de Agrobiotecnología / Agrobioteknologiako Institutuaes
dc.rights.accessRightsinfo:eu-repo/semantics/openAccessen
dc.rights.accessRightsAcceso abierto / Sarbide irekiaes
dc.identifier.doi10.1051/vetres:2006034
dc.relation.publisherversionhttps://doi.org/10.1051/vetres:2006034
dc.type.versioninfo:eu-repo/semantics/publishedVersionen
dc.type.versionVersión publicada / Argitaratu den bertsioaes


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