A report on drug-induced kerato-conjunctivitis sicca in dogs.

Kerato-conjunctivitis sicca is reported in beagle dogs treated with an antispasmodic compound for 26 weeks during a routine toxicity study. There was a deficiency of lachrymal secretion associated with keratitis and corneal vascularization. Histopathologically, the changes were characterized by vascularization, fibroblast proliferation and infiltration of inflammatory cells in the substantia propria. In some cases, the inflammation also occurred in corneal epithelium, ocular conjunctiva and corneal limbi.