Figure 3
From: The pathogenesis of low pathogenicity H7 avian influenza viruses in chickens, ducks and turkeys
Immunohistochemical staining for avian influenza virus antigen in tissues of chickens, turkeys and ducks infected with H7 AI viruses, 2 days PI. A. Viral antigen (red staining) in bronchial epithelial cells from a turkey infected with TK/VA/67. B. and C. Viral antigen (red staining) in the intestinal epithelium and cecal tonsils of a chicken infected with CK/NY/3112. D. Viral antigen (red staining) in macrophages in the spleen of ducks infected with TK/VA/67.