Dermatophytes are a group of fungi that primarily infect the skin, hair, and nails. They thrive in warm, moist environments and can cause various skin conditions, such as ringworm, athlete's foot, and jock itch. These fungi feed on keratin, a protein found in the outer layer of the skin, making them particularly suited for these areas. Transmission of dermatophyte infections often occurs through direct contact with an infected person, animal, or contaminated surfaces. Treatment typically involves antifungal medications, which can be topical or oral, depending on the severity of the infection. Maintaining good hygiene and keeping skin dry can help prevent these infections.