F10 Germicidal Treatment Shampoo contains F10 core actives to treat yeast and fungi, like ringworm. It also helps to get other skin diseases under control. It is important to remember that ringworm can spread and therefore one needs to take care to ‘treat’ the environment. The F10 product range consists of disinfectants and personal hand care products to stop the ringworm from spreading. The products are safe, effective and suitable for dogs, cats and horses.