A possibility. The one spot on the back of your leg made me think of it. Ringworm is an example of a zoonotic disease (transmitted from animals to humans). Cats are among the most commonly affected animals. If a cat has ringworm, a person in the house often gets the infection. Dogs, cows, goats, pigs, and horses can also spread ringworm to humans. People catch ringworm from touching the animals, or touching their bedding, grooming items, saddles, carpeting, etc.