Photomicrographs from a Fisher (Pekania pennanti) found dead in Wisconsin, USA

Photomicrographs from a Fisher (Pekania pennanti) found dead in Wisconsin, USA. (A) Blood vessels in the brain are surrounded by low numbers of lymphocytes and plasma cells (arrows). H&E stain. (B) A blood vessel in the brain is surrounded by low numbers of lymphocytes and plasma cells (black arrow). Adjacent neuropil contains many shrunken and hypereosinophilic (necrotic) neurons (arrowheads) and activated microglia (white arrows). H&E stain. C) Focally, pancreatic acini are replaced by eosinophilic and cellular debris (necrosis) (*). H&E stain. (D) There is a focal capsular and subcapsular area in the liver with replacement of hepatocytes by hypereosinophilic material (necrosis) (arrows). H&E stain.