| Edema | Capillary | Epithelium | Infiltrates | Exudation |
---|
| 1 | 1 | 1 | 0 | 0 |
NS (n = 3) | 2 | 2 | 1 | 0 | 0 |
| 2 | 2 | 1 | 0 | 0 |
| 2 | 2 | 2 | 0 | 2 |
AD (n = 3) | 2 | 2 | 2 | 0 | 2 |
| 2 | 2 | 2 | 1 | 2 |
- Perivascular and peribronchial edema (Edema), leukocytes in pulmonary capillary (Capillary), nuclear swelling in epithelial cell (Epithelium), cellular infiltration into alveoli (Infiltrates), and exudation into alveoli (Exudation) were assessed by a pathologist in a blinded manner. These observations were scored using three grades: 0, no or mild change; 1, moderate change; and 2, marked change