Gentanazol spray is a solution for the control of major infectious dermatitis, the anti-inflammatory action of dexamethasone promotes the recovery of affected tissues and the combination of ketoconazole and gentamicin provides an antifungal and antibacterial effect, effective for the treatment of infections caused by: Microsporum canis, Microsporum gypseum, Trichophyton mentagrophytes, Trichophyton tonsurans, Trichophyton rubrum, Trichophyton verrucosum, Malassesia pachidermatis, Candida albicans, Staphylococcus intermedius, Staphylococcus aureus, Staphylococcus spp, Proteus mirabilis, Pseudomona aeruginosa and Pseudomonas spp in felines and canines.