Volume 7, Number 4—August 2001
THEME ISSUE
West Nile Virus
West Nile Virus
Fatal Encephalitis and Myocarditis in Young Domestic Geese (Anser anser domesticus) Caused by West Nile Virus
Figure

Figure. . Two-week-old goslings that were subcutaneously inoculated with 9/99 New York strain of WN virus. (A) Abnormal posture of the head 10 days postinoculation (PI) (#80). The gosling had rhythmic side-to-side movement of the head. Bar = 2.5 cm. (B) Severe nonsuppurative encephalitis at 10 days PI (#80). HE stain. Bar = 50 µm. (C) Severe diffuse myocarditis with edema and myocyte necrosis at 6 days PI (#86). HE stain. Bar = 50 µm. (D) Flaviviral antigens in degenerating myocytes and macrophages within a focus of inflamed myocardium. Immunohistochemical (IHC) strain. Bar = 25 µm. (E) Flaviviral antigens in degenerating parenchymal epithelial cells and foamy macrophages within a focus of pancreatitis. IHC. Bar = 25 µm. (F) Flaviviral antigens in ganglion cells within muscularis mucosae. IHC. Bar = 25 µm.