Paratuberculosis sero-status and milk production, SCC and calving interval in Irish dairy herds
dc.contributor.author | Hoogendam, K | * |
dc.contributor.author | Richardson, Esther K. B. | * |
dc.contributor.author | Mee, John F | * |
dc.date.accessioned | 2012-12-04T12:45:47Z | |
dc.date.available | 2012-12-04T12:45:47Z | |
dc.date.issued | 2009-04-01 | |
dc.identifier.citation | Irish Veterinary Journal. 2009 Apr 01;62(Suppl 4):265-271 | en_GB |
dc.identifier.uri | http://hdl.handle.net/11019/289 | |
dc.description | peer-reviewed | |
dc.description.abstract | The 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.iso | en | en_GB |
dc.publisher | Biomed Central | |
dc.relation.ispartofseries | Irish Veterinary Journal | |
dc.subject | Paratuberculosis sero-status | |
dc.subject | Irish dairy herd | |
dc.subject | Economic breeding index | |
dc.subject | Estimated breeding value | |
dc.title | Paratuberculosis sero-status and milk production, SCC and calving interval in Irish dairy herds | en_GB |
dc.type | Article | en_GB |
dc.identifier.doi | http://dx.doi.org/10.1186/2046-0481-62-4-265 | |
refterms.dateFOA | 2018-01-12T07:38:27Z |
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