Table 1 Summary of the groups of calves used in the study
Group | Number of Calves | BNP status | Farm of origin | BVDV vaccination status of dam | BVDV vaccination status of dam from which colostrum was ingested | Bone marrow histopathology |
|---|---|---|---|---|---|---|
1 | 139 | Unknown - no clinical signs of BNP | A | Vaccinated | Vaccinated (own dam) | No |
2a | 14 | BNP (Field cases) | A and similar local farms | Vaccinated | Vaccinated (own dam) | Yes |
2b | 5 | BNP (Experimentally induced disease [22]) | B and C | Unvaccinated | Vaccinated (not own dam) | Yes |
3a | 8 | Unaffected normal | A | Vaccinated | Unvaccinated (not own dam) | No |
3b | 7 | Unaffected normal | A | Unvaccinated | Unvaccinated (own dam) | No |
3c | 5 | Unaffected normal (Experimental controls [22]) | B and C | Unvaccinated | Unvaccinated (not own dam) | Yes |