Table 4.
Effect of supplemental vitamin E (VE) on bovine viral diarrhea virus (BVDV) type 1 and 2 antibody titers of beef steers
| Supplemental VE treatment1 | Contrast P-value | |||||||
|---|---|---|---|---|---|---|---|---|
| CON | LOW | MED | HIGH | SEM | Linear | Quadratic | Cubic | |
| BVDV type 12 | ||||||||
| Day 63 (0)4 | 2.3 | 3.0 | 3.6 | 2.4 | – | – | – | – |
| Day 14 (8) | 1.7 | 1.7 | 1.4 | 2.1 | 0.24 | 0.32 | 0.17 | 0.47 |
| Day 26 (20) | 1.5 | 2.1 | 2.0 | 2.5 | 0.33 | 0.04 | 0.77 | 0.29 |
| BVDV type 22 | ||||||||
| Day 63 (0)4 | 4.6 | 5.3 | 5.2 | 5.0 | – | – | – | – |
| Day 14 (8) | 3.7 | 3.9 | 4.1 | 3.9 | 0.34 | 0.61 | 0.47 | 0.91 |
| Day 26 (20) | 4.2 | 4.5 | 4.2 | 4.6 | 0.31 | 0.42 | 0.72 | 0.32 |
1VE = vitamin E (ROVIMIX E-50 Adsorbate, DSM Nutritional Products, Heerlen, The Netherlands); CON = control (no supplemental VE); LOW = VE at 25 IU/kg DM; MED = VE at 500 IU per steer daily; HIGH = VE at 1,000 IU per steer daily.
2Natural log-transformed; transformed means and SEM presented.
3Blood was collected prior to administration of a booster vaccine (Bovi-Shield Gold, One Shot, Zoetis) on day 6 of the study; values from day 6 were utilized as a covariate in analysis.
4Day relative to vaccination indicated in parentheses.