Changes

* May be fibrinous exudates on surface of mucosa.

* May be fibrinous exudates on surface of mucosa.

* The submucosa and lamina propria are not affected and are left intact.  

* The submucosa and lamina propria are not affected and are left intact.  

** Many [[Neutrophils - WikiBlood|neutrophils]] in the lamina propria.  

** Many [[Neutrophils|neutrophils]] in the lamina propria.  

* Cyst-like structures are seen in the deepest parts of  the glands of the intestinal mucosa, if the animal survives for more than a few days.

* Cyst-like structures are seen in the deepest parts of  the glands of the intestinal mucosa, if the animal survives for more than a few days.

** Flattened epithelial cells line these cystic glands.

** Flattened epithelial cells line these cystic glands.