FIG. 6.
Histopathological analysis of 4-week-old chickens infected with cormorant virus NV/2005. (A) Chicken inoculated with NV/2005, 6 dpi. Cerebellum, molecular layer. Multifocal areas of perivascular cuffing and gliosis. The vessels have hypertrophic endothelial cells. (B) Chicken inoculated with PBS. Cerebellum, molecular layer. There is no perivascular cuffing, and the vessels are minimally evident. (C) Chicken inoculated with NV/2005, 6 dpi. Spleen. The spleen is histologically normal, with no evidence of necrosis or lymphocytic depletion. (D) Chicken inoculated with CA/2002, 3 dpi. Spleen. The spleen has multifocal to coalescing areas of necrosis and severe depletion of lymphocytes.