Risk factors for anaplasmosis in dairy cows during the peripartum

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dc.contributor.authorSilva, Jenevaldo Barbosa da [UNESP]
dc.contributor.authorFonseca, Adivaldo Henrique da
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal Rural do Rio de Janeiro (UFRRJ)
dc.date.accessioned2014-12-03T13:08:59Z
dc.date.available2014-12-03T13:08:59Z
dc.date.issued2014-02-01
dc.description.abstractAnaplasma marginale is endemic in tropical and subtropical areas around the world. Some studies have suggested that cows during peripartum may present a transient immunosuppression state and development of clinical signs of anaplasmosis. The aim of this study was to investigate the relationship between some risk factors and the seroprevalence of A. marginale in dairy cows during peripartum in Rio de Janeiro, Brazil. The risk factors analyzed in association with the prevalence of antibodies against A. marginale in dairy cows were calving season, reproductive experience, breed standard, tick infestations, stocking density, and milk yield. The antibodies against A. marginale were tested in indirect enzyme-linked immunosorbent assays. A primary screening using a 2 x k contingency table of the exposed variables with the outcomes was performed. All variables for which p < 0.20 were included in a fixed effects log regression. The risk factors investigated to anaplasmosis were calving (OR 2.61, IC 1.08-7.63), breed standard (OR 3.83, IC 0.08-0.28), reproductive experience (OR 33.7, IC 2.14-5.16), milk yield (OR 3.9, IC 2.24-7.03), Rhipicephalus microplus infestations (OR 10.3, IC 0.05-0.17), and stocking density (OR 22.3, IC 0.05-0.17). Low titers of antibodies against A. marginale during peripartum had been characterized as a period previous to development of clinical anaplasmosis. Thus, studies on anaplasmosis should consider each farm as an epidemiological unit, where environmental and immunological factors may influence the endemic status of the pathogen.en
dc.description.affiliationUNESP, Fac Ciencias Agr & Vet, BR-14870000 Jaboticabal, SP, Brazil
dc.description.affiliationUniv Fed Rural Rio de Janeiro UFRRJ, BR-23890000 Seropedica, RJ, Brazil
dc.description.affiliationUnespUNESP, Fac Ciencias Agr & Vet, BR-14870000 Jaboticabal, SP, Brazil
dc.format.extent461-465
dc.identifierhttp://dx.doi.org/10.1007/s11250-013-0514-0
dc.identifier.citationTropical Animal Health And Production. Dordrecht: Springer, v. 46, n. 2, p. 461-465, 2014.
dc.identifier.doi10.1007/s11250-013-0514-0
dc.identifier.issn0049-4747
dc.identifier.urihttp://hdl.handle.net/11449/111805
dc.identifier.wosWOS:000330986900025
dc.language.isoeng
dc.publisherSpringer
dc.relation.ispartofTropical Animal Health and Production
dc.relation.ispartofjcr0.975
dc.relation.ispartofsjr0,511
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectAnaplasma marginaleen
dc.subjectCattleen
dc.subjectDiagnosticsen
dc.subjectPeripartumen
dc.subjectSerologic testingen
dc.titleRisk factors for anaplasmosis in dairy cows during the peripartumen
dc.typeArtigo
dcterms.licensehttp://www.springer.com/open+access/authors+rights?SGWID=0-176704-12-683201-0
dcterms.rightsHolderSpringer

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