Figure 7-37.

Necrotizing Stomatitis, Calf Diphtheria, Tongue, Calf.
The dorsal surface of the tongue is ulcerated, and the ulcers are covered by a yellow-white diphtheric membrane. Calf diphtheria is caused by infection with the bacterium Fusobacterium necrophorum secondary to abrasion and/or trauma to the mucosal epithelium of the oral cavity or larynx.
(Courtesy Dr. M.D. McGavin, College of Veterinary Medicine, University of Tennessee.)