Dermatophytic onychomycosis is a fungal infection of the nail plate, nail bed, and, in some cases, the skin surrounding the nail plate. It is caused by yeast, dermatophytes, and molds; dermatophytes account for 90% of all cases. The fungus, especially Trichophyton rubrum, Trichophyton mentagrophytes, and Epidermophyton floccosum, infects the skin, hair, or nails. It is often perceived by people to be an active and contagious ... Read more