Figure 5.

Histopathology of GS02-infected pigeons. Pigeon tissues were fixed with 4% paraformaldehyde fixative, sectioned and stained with hematoxylin and eosin. The histological lesions were as follows: perivascular lymphocytic cuffing in the cerebral and cerebellar cortex (black arrows). Degeneration and necrosis of pancreatic cells. Vacuolar degeneration of intestinal villous epithelial cells. Hemorrhage, degeneration and necrosis of glandular gastric connective tissues. GS02, Gansu/China/02/2020.