Superficial fungal infections and patients with Hidradenitis suppurativa - a study under the Danish Blood Donor Study.

Superficial fungal infections (SFI) are common diseases affecting the skin, hair, nails, and mucosal membranes. They are often caused by dermatophytes and yeasts, e.g. Trichophyton, Candida, and Malassezia1 . Hidradenitis suppurativa (HS) is a chronic, inflammatory skin disease of the intertriginous areas associated with minor infections2 , peripheral vascular disease, diabetes, and smoking3 , the last three of which are risk factors for the development of SFI4 . Despite this, and the anatomical overlap between HS and types of SFI e.g. intertriginous candidiasis and tinea cruris, the possibility of an association between HS and SFI has never been investigated.