Table 1 Microscopic lesions in tissues of ducks spontaneously and experimentally infected by TMUVa
From: Pathogenicity of egg-type duck-origin isolate of Tembusu virus in Pekin ducklings
Tissue | Microscopic lesion | Spontaneously infected Jinding ducks | Experimentally infected Pekin ducks |
|---|---|---|---|
Brain | Edema | + (5) | +++ (5) |
Multifocal gliosis | +++ (4) | +++ (3) | |
Congestion | ++ (1) | ++++ (2) | |
Neuronal swelling | – | ++ (3) | |
Neuronal necrosis | – | ++ (1) | |
Lymphocytic infiltration | – | +++ (1) | |
Spleen | Hemorrhage | ++ (4) | – |
Lymphocyte necrosis and evacuation | ++ (2) | ++++ (5) | |
Liver | Hepatocyte steatosis | + (3) | ++ (1) |
Lymphocytic infiltration | + (3) | ++ (5) | |
Congestion | + (1) | – | |
Hepatic sinusoid dilatation | – | ++ (5) | |
Kidney | Renal tubulointerstitial congestion | + (2) | + (1) |
Lymphocytic infiltration | ++ (2) | – | |
Renal tubular epithelial cell necrosis | – | + (1) | |
Heart | Inflammatory cell infiltration | ++ (2) | ND |
Pancreas | Acinar cell necrosis | + (3) | ND |
Lymphocytic infiltration | ++ (2) | ND |