Experimental Medication of Equine Ringworm Due to Trichophyton Equinum Var. Autotrophicum

The study tested 12 medicaments for treating Trichophyton equinum var. autotrophicum in horses. Povidone iodine, thiabendazole ointment, captan ointment, and Burroughs Wellcome Ringworm Ointment were effective but may not be practical for treating large numbers of horses. Aqueous washes with 0.5% hexetidine or 0.3% chloramine-T, as well as etisazole and thiabendazole suspensions, did not prevent fungal isolation from lesions for up to 15 days. Solutions of 2.5% lime sulphur and 2% captan were least effective, with fungi isolated for up to 30 days. Treatments with 10% nystatin ointment, 10% iodine fortis, 10% Medol, and Queensland Itch Dressing were unsatisfactory. The study emphasized that mass treatment should focus on reducing infection spread, and hair regrowth should not be used as a sole indicator of treatment success, as it was minimally affected by medication.