Scoring System for Lesions Induced by Different Strains of Newcastle Disease Virus in Chicken

Figure 2

Brain of SPF chickens. (a) Day 5 pi of vNDV, endothelial hypertrophy (white arrow) and neuronal necrosis (black arrow). (b) Day 4 pi of vNDV, gliosis (arrow). (c) Control group, lesion scoring of 0. HE, scale bar = 100 μm.

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