Trichophyton is a genus of fungi that primarily causes skin infections in humans and animals. These fungi are known for leading to conditions such as athlete's foot, ringworm, and nail infections. They thrive in warm, moist environments and can be transmitted through direct contact with infected individuals or contaminated surfaces. There are several species within the Trichophyton genus, including Trichophyton rubrum and Trichophyton mentagrophytes. Diagnosis typically involves examining skin samples under a microscope or culturing the fungus. Treatment often includes antifungal medications, which can be topical or oral, depending on the severity of the infection.