Microsporum is a genus of fungi that primarily causes skin infections in humans and animals. These infections are often referred to as dermatophyte infections, commonly known as ringworm. The fungi thrive in warm, moist environments and can be transmitted through direct contact with infected individuals or contaminated surfaces. There are several species within the Microsporum genus, with Microsporum canis being one of the most notable, as it often infects cats and dogs but can also affect humans. Symptoms of infection may include red, itchy patches on the skin, hair loss, and scaling. Treatment typically involves antifungal medications.