Trichophytia (Shearing lichen)

Fungal disease of the skin, hair and nails. There are superficial (anthroponotic) and infiltrative-suppurative trichophytosis.

Superficial trichophytosis is rare, usually in children. The causative agents are anthropophilic trichophytons (Tr. violaceum, Tr. tonsurans), affecting the stratum corneum of the epidermis and hair (of the “endothrix” type). The source is a sick person. Infection occurs through direct contact or through hats, brushes, combs, underwear and other objects.

Numerous lesions with scales, swollen hyperemic skin and broken hair appear on the scalp. Swelling spots with peeling and blisters appear on smooth skin. There is slight itching.

Chronic trichophytosis occurs in women and is characterized by atrophic bald spots on the head, changes in the nails and extensive lesions on smooth skin.

Infiltrative-suppurative trichophytosis is caused by zoophilic trichophytons from animals. It affects any age, occurs acutely with suppuration and heals without relapse. Localized on open areas of the skin and scalp.

The lesions transform into plaques and nodes with suppuration and the formation of deep abscesses. Possible lymphadenitis. The outcome is scarring.

The diagnosis is confirmed by microscopy and culture. Treatment is with griseofulvin and iodine. The prognosis is favorable.

Prevention includes isolation of patients, use of personal hygiene products and veterinary measures.