Ringworm is fairly common in cats, particularly those that are not groomed or looked after well enough. However, even the most cared-for cats can get ringworm because it is so contagious. However, ringworm is not caused by a worm. Sorry, for telling you how to suck eggs, if you already knew that, but a lot of people do not...
While the name implies otherwise, ringworm is a fungus infection, not a worm. These fungi reside and multiply in the top layer of the epidermis. Highly contagious in nature, people and pets can infect each other and cross species in very diverse manners. Contact with an infected person or animal is by far the most common mode of transmission...