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
Original language | English |
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Pages (from-to) | 265-271 |
Journal | Irish Veterinary Journal |
Volume | 62 |
Issue number | 4 |
DOIs | |
Publication status | Published - 2009 |
Keywords
- bovine viral diarrhea
- mycobacterium-paratuberculosis
- johnes-disease
- infection
- cattle
- cows
- usa
- association
- parameters
- michigan