Allergic Fungal Airway Disease.

Area of Science:

• Mycology
• Immunology
• Pulmonology

Background:

• Fungi are ubiquitous and implicated in type I allergic disease, yet diagnostic reagents exist for few species.
• Distinguishing between thermotolerant and non-thermotolerant fungi is crucial for understanding asthma.
• Thermotolerant fungi pose a greater risk for persistent airway inflammation and tissue damage.

Purpose of the Study:

• To review fungal allergens and associated clinical diseases.
• To clarify terminology in fungal allergy and asthma.
• To propose a new term, allergic fungal airway disease, for at-risk asthma patients.

Main Methods:

• Literature review of fungal allergens and clinical manifestations.
• Analysis of the impact of thermotolerance on fungal allergenicity.
• Discussion of diagnostic and management strategies for fungal-related asthma.

Main Results:

• Non-thermotolerant fungi (e.g., Alternaria) act as aeroallergens with exposure-dependent effects.
• Thermotolerant fungi (e.g., Aspergillus, Candida) cause persistent inflammation and diverse allergenic stimuli.
• Sensitization to thermotolerant fungi is linked to fixed airflow obstruction, bronchiectasis, and fibrosis.

Conclusions:

• Fungal allergy in asthma is complex, with thermotolerant species posing significant risks.
• A new term, allergic fungal airway disease, is proposed to encompass asthma patients at risk of lung damage.
• Effective management strategies for fungal-related asthma require further investigation.