Researchers in northwestern Iran studied fungal infections of skin, hair, and nails by identifying different types of dermatophytes from patient samples and soil. They found that a fungus called Trichophyton mentagrophytes was the most common cause, but also discovered a rare fungus called Myriodontium keratinophilum causing nail infections. Using modern DNA testing methods, they identified seven different dermatophyte species and several other soil fungi, providing important information about fungal infections in this region.