Table 2.
Clinical observations recorded during 2-weekly sampling visits and slaughter lung evaluation
| Weeks 5 to 8 | Weeks 9 to 15 | Week 16 to finish | Pigs evaluated at slaughter/Number of pigs in the batch at weaning | Average EP-like lesion score at slaughter | Prevalence (%) of pleurisy lesions at slaughter | |
|---|---|---|---|---|---|---|
| A1 | Respiratory (+) Neurological (+) |
Respiratory (++) | Respiratory (++) | 250/786 | 1.2 | 12 |
| A2 | No signs observed | No signs observed | No signs observed | 248/1005 | 1.4 | 1 |
| B1 | Enteric (+) | Respiratory (+) Neurological (++) |
Respiratory (+) Tail biting. (+) |
202/1204 | 1.4 | 6 |
| B2 | Enteric (+++) Respiratory (++) |
Neurological (+), Enteric (+) Respiratory (+++), Wasting (++) Uneven growth (+++) |
Respiratory (++) Wasting (+) Uneven growth (+++) |
126/1063 | 7.8 | 1 |
| C1 | Respiratory (+) Neurological (+) Enteric (+) |
Respiratory (++) Musculoskeletal (+) |
Uneven growth (++) Musculoskeletal (+) Respiratory (+) |
163/709 | 4.7 | 1 |
| C2 | No signs observed | Respiratory (+) | Respiratory (+++) | 157/1105 | 1.9 | 2 |
“+” indicates an estimation of a low proportion (<15%) of affected pigs, “++” a moderate proportion (15–35%), and “+++” a high proportion (>35%) of affected pigs. EP-Like lesions based on the BPHS system based on the Goodwin scale [36]