Feline herpesvirus 1 causes a unique ulcerative, often persistent, facial d
ermatitis or stomatitis syndrome associated with epithelial cell necrosis,
eosinophilic inflammation, and intraepithelial herpesvirus inclusion bodies
. Feline herpesvirus 1 can be identified in lesional tissue by PCR methodol
ogy Most cases developed under circumstances suggesting reactivation of lat
ent herpesvirus infection, and previous glucocorticoid therapy or stress fr
om overcrowding may have played a role in lesion development.