[Dermatophyte : Current situation]

Area of Science:

• Dermatology
• Mycology
• Immunology

Background:

• A mycid is defined as a hyperergic reaction to a remote localized infection without detectable fungus.
• Dermatophytids, a type of mycid caused by dermatophytes, have specific diagnostic criteria.
• The most common dermatophytid involves symmetrical hand dyshidrotic mycid linked to foot tinea, often by Trichophyton mentagrophytes.

Purpose of the Study:

• To define the criteria for dermatophytids.
• To describe the clinical presentation and management of dermatophytids.
• To differentiate dermatophytids from drug reactions.

Main Methods:

• Review of clinical criteria for mycid and dermatophytid diagnosis.
• Description of common clinical presentations, including hand and scalp infections.
• Discussion of treatment strategies, including systemic and topical therapies.

Main Results:

• Dermatophytid criteria include proven dermatophytosis, absence of fungi in lesions, initial worsening with potent antimycotics, and clearing after sufficient treatment.
• Dermatophytids associated with tinea capitis exhibit clinical variability and can be mistaken for drug reactions.
• Topical antifungal and corticosteroid combinations provide rapid reduction in inflammation and pruritus, especially after systemic antifungal initiation flares.

Conclusions:

• Dermatophytids are immune-mediated reactions to fungal infections.
• Accurate diagnosis and differentiation from drug reactions are crucial.
• Combined topical therapy offers effective symptom management, particularly for overtreatment flares.