Histopathological findings
| Piglet | Pneumonia score | |
| More involved lobe | More preserved lobe | |
| 1 | Abscessed pneumonia | Confluent pneumonia |
| 2 | Confluent pneumonia | Confluent pneumonia |
| 3 | Pneumonia | Purulent mucus plugging |
| 4 | Abscessed pneumonia | Confluent pneumonia |
| 5 | Pneumonia | Purulent mucus plugging |