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.
Fungal beard infection (tinea barbae)
Clinical features of tinea barbae
Tinea barbae most often affects farmers and is due to direct contact with an infected animal. It is rarely passed from one person to another.
Tinea barbae is usually very inflamed with red lumpy areas, pustules and crusting around the hairs (kerion). The hairs can be pulled out easily. Surprisingly, it is not excessively itchy or painful.
Tinea barbae can result in an id reaction, especially just after starting antifungal treatment.
Diagnosis of tinea barbae
The diagnosis of tinea barbae is confirmed by microscopy and culture of skin scrapings and hair pulled out by the roots.