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Ballooning Degeneration, Papular Stomatitis, Oral Mucosa, Ox.
Cells infected by certain poxviruses (e.g., papular stomatitis virus) cannot regulate their volume and undergo hydropic degeneration at certain stages of the infection. These cells may become so distended (ballooning degeneration) that they eventually rupture. Note cytoplasmic viral inclusion bodies (arrows). H&E stain.
(Courtesy Dr. M.D. McGavin, College of Veterinary Medicine, University of Tennessee.)
