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dc.contributor.authorHoogendam, K*
dc.contributor.authorRichardson, Esther K. B.*
dc.contributor.authorMee, John F*
dc.date.accessioned2012-12-04T12:45:47Z
dc.date.available2012-12-04T12:45:47Z
dc.date.issued2009-04-01
dc.identifier.citationIrish Veterinary Journal. 2009 Apr 01;62(Suppl 4):265-271en_GB
dc.identifier.urihttp://hdl.handle.net/11019/289
dc.descriptionpeer-reviewed
dc.description.abstractThe objective of this study was to investigate the impact of paratuberculosis sero-status on milk yield, fat, protein, somatic cell count and calving interval in Irish dairy herds. Serum from all animals over 12 months of age (n = 2,602) in 34 dairy herds was tested for antibodies to Mycobacterium avium subsp. paratuberculosis using an ELISA. Herds were categorised by sero-status into positive, non-negative and negative, where a positive herd contained two or more positive cows, a non-negative herd contained only one positive cow and a negative herd contained no positive cows. Data at animal, parity and herd-level were analysed by multiple regression using general linear models. Positive herds (mean herd size = 129 cows) and non-negative herds (81 cows) were larger than negative herds (72 cows) (P < 0.01). Negative herds had the highest economic breeding index (EBI), while positive herds had the highest estimated breeding value (EBV) for milk yield. There was no significant effect of paratuberculosis sero-status at animal, parity or herd-level on milk yield, milk fat or protein production, somatic cell count score (SCCS) or calving interval. Negative herds tended to have a lower SCCS than positive and nonnegative herds (P = 0.087). This study only examined the effects of paratuberculosis sero-status but did not examine the clinical effects of Johne's disease at the farm or dairy industry levels.en_GB
dc.language.isoenen_GB
dc.publisherBiomed Central
dc.relation.ispartofseriesIrish Veterinary Journal
dc.subjectParatuberculosis sero-status
dc.subjectIrish dairy herd
dc.subjectEconomic breeding index
dc.subjectEstimated breeding value
dc.titleParatuberculosis sero-status and milk production, SCC and calving interval in Irish dairy herdsen_GB
dc.typeArticleen_GB
dc.identifier.doihttp://dx.doi.org/10.1186/2046-0481-62-4-265
refterms.dateFOA2018-01-12T07:38:27Z


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