Figure 2. Histopathologic and immunohistochemical (IHC) testing results for Baikal teal. A) Focal necrosis in pancreas (hematoxylin and eosin [H&E] stain). B) Avian influenza virus antigen in necrotic pancreatic acini ([IHC stain). C) Gout and renal tubular necrosis (H&E stain). D) Avian influenza virus antigen in renal tubule cells (IHC stain). Original magnifications ×100.