Photographs and photomicrographs from a Common Raccoon found dead in Wisconsin

Photographs and photomicrographs from a Common Raccoon (Procyon lotor) found dead in a prairie in Wisconsin, USA. (A) There is abrupt segmental reddening of the serosa of the distal jejunum and proximal ileum (arrows). (B) The mucosa of an affected area of the distal jejunum is reddened and bloody (C). The mucosal surface of the distal jejunum is covered with a thick mat of bacteria and necrotic cellular debris (arrow). There is severe diffuse villar blunting and loss, such that only the dilated crypts remain (asterisk). H&E stain. (D) Dilated crypts are lined by flattened epithelium (arrow) and contain necrotic cellular debris (asterisk). H&E stain.