Evaluation of itraconazole-dimethyl sulfoxide ointment for treatment of keratomycosis in nine horses.

Objective: To evaluate the efficacy of itraconazole-dimethyl sulfoxide ointment for treatment of keratomycosis in horses in the northeastern United States.
Design: Prospective clinical trial.
Animals: 9 horses (10 affected eyes).
Procedure: All horses treated for keratomycosis at Cornell University between July 1994 and July 1996 were included in the study. The diagnosis of keratomycosis was confirmed by cytologic examination, and all horses were treated with 0.25 ml of a 1% itraconazole-30% dimethyl sulfoxide petrolatum-based ointment, applied to the affected eye every 4 hours.
Results: Topical application of itraconazole-dimethyl sulfoxide ointment (q 4 h) resolved keratomycosis in 8 of 10 eyes; mean duration of treatment was 34.6 days (range, 16 to 53 days).
Clinical Implications: Results of this study indicate topical administration of itraconazole-dimethyl sulfoxide ointment may provide an additional treatment option for horses with keratomycosis.