Tinea barbae is the name used for infection of the beard and moustache areas of the face with a dermatophyte fungus. It is less common than tinea capitis and generally affects only adult men.
The cause of tinea barbae is most often a zoophilic (animal) fungus:
T. verrucosum (originating from cattle)
T. mentagrophytes var. equinum (originating from horses)
Tinea barbae is usually due to infection of coarse facial hair with an ectothrix pattern (spores on the outside). In ectothrix infections, the fungal filaments (hyphae) and spores (arthroconidia) cover the outside of the hair.