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Hydropic Change, Papular Stomatitis, Hard Palate Mucosa, Cow.
There is massive cytoplasmic swelling (arrows) of the epithelial cells of the stratum spinosum. At an earlier stage, these cells may contain intracytoplasmic eosinophilic parapoxvirus inclusions (not visible here). H&E stain.
(Courtesy Dr. M.D. McGavin, College of Veterinary Medicine, University of Tennessee.)
