Troy Iodine Spray is an antiseptic spray for use in dressing wounds and preventing skin infections caused by bacteria and fungi. It can be used in dogs, cats, horses, and other mammalian species. Iodine is a compound that kills bacteria and fungus in a quick and effective manner. This spray can be used to treat bacterial skin infections, fungal infections such as ringworm, and to prevent infection in cuts and wounds (however can be painful in open skin).