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Gross lung and large intestinal lesion severity scores postchallenge and tissue colonization at necropsy
| Strain or group | Lesions (%a) at necropsy
|
|
|---|---|---|
| Lung | Cecum and/or colon | |
| Nonvaccinated, challenged | 0 | 12.7 |
| Nonvaccinated, nonchallenged | 0 | 0 |
| NOBL SC-54 | 4.3 | 8.3 |
| χ3781 | 0 | 4.3 |
| χ3923 | 0 | 21.0 |
| χ4186 | 0 | 0 |
| χ4497 | 0 | 0 |
| χ4522 | 0 | 46.0 |
| χ4814 | 0 | 21.0 |
Mean percentage of maximal score (score of 3).
