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Salmonella Dublin antibody titers in cows and colostrum from cows that were vaccinated twice with Salmonella Dublin (vaccinated group) in late gestation as compared with cows that were not vaccinated (control group)1
| Item | Control group |
Vaccinated group |
P-value |
|---|---|---|---|
| Before vaccination (3 wk before dry-off) | −4.2 ± 1.5 | −6.9 ± 0.9 | 0.68 |
| After vaccination (at calving) | −9.4 ± 1.1 | 40.3 ± 9.1 | 0.007 |
| Colostrum | −17.2 ± 0.4 | 14.8 ± 7.6 | 0.03 |
Data are presented as percent positivity.
