Table 2.
The percentageof TB macroscopic lesions in BCG vaccinated and control calves after exposure to an infected herd in a natural transmission setting
| Tissue | BCG vaccinates Proportion of lesioned tissues | Controls: Proportion of lesioned tissues | Reduction in frequency of pathology | Chi‐square test | p‐value |
|---|---|---|---|---|---|
| Head lymph nodes (LN) | 12.5% (23/184) | 28% (59/208) | 56% | 14.86 | .0001 |
| Thoracic LNs | 32% (37/115) | 56% (73/130) | 43% | 14.18 | .0002 |
| Abdominal LNs | 11% (5/46) | 38% (20/52) | 72% | 9.78 | .0017 |
| Lung lobes | 16% (26/161) | 26% (47/182) | 38% | 4.77 | .029 |
| Total Pathology | 18% (91/506) | 35% (202/572) | 49% | 40.74 | .0001 |