A dermatophyte is the more scientific term for skin fungus that requires keratin for growth and can cause infections of the hair, skin, and nails in large and small animals and in humans. Most commonly, this condition is known as ringworm, despite there being no worms involved. In this episode, Dr. Brandon Dominguez and Dr. Cathy Campbell discuss testing options with the microbiology laboratory supervisor in College Station, Kelsey Bond.