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Updated: Jan 8, 2026

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Aspergillus fumigatus Sensitization Is Associated With High-Risk Bronchiectasis.

Pei Yee Tiew1, Jayanth Kumar Narayana2, Tavleen Kaur Jaggi2

  • 1Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore; Department of Respiratory and Critical Care Medicine, Singapore General Hospital, Singapore.

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|December 12, 2025
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Summary

Fungal sensitization, especially to Aspergillus fumigatus, is linked to worse bronchiectasis outcomes, particularly in low-risk patients and those of Asian descent. This finding highlights a potentially treatable factor in managing bronchiectasis severity.

Keywords:
AsianAspergillus sensitizationbronchiectasisexacerbationsfungi

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Area of Science:

  • Pulmonary Medicine
  • Allergy and Immunology
  • Respiratory Diseases

Background:

  • Fungal sensitization is an emerging factor in chronic respiratory conditions.
  • Its specific role and clinical impact in bronchiectasis are not well understood.
  • This study offers a detailed evaluation of fungal sensitization in bronchiectasis.

Purpose of the Study:

  • To determine the prevalence of fungal sensitization in bronchiectasis patients.
  • To investigate the clinical implications of fungal sensitization.
  • To assess the relationship between fungal sensitization and disease severity, exacerbations, and comorbidities.

Main Methods:

  • An international, multi-center study involving 277 bronchiectasis patients.
  • Utilized an expanded panel of 35 fungal allergens (11 crude, 24 recombinant).
  • Assessed sensitization against clinical characteristics, exacerbation frequency, and geographic origin.

Main Results:

  • Sensitization to recombinant Aspergillus fumigatus (rAsp f) allergens 12, 15, and 17 correlated with bronchiectasis severity.
  • This association was most pronounced in low-risk patients, showing increased disease severity and bronchiectasis-COPD overlap.
  • Asian patients sensitized to these rAsp f allergens exhibited poorer lung function and more severe disease.

Conclusions:

  • Aspergillus fumigatus sensitization, particularly to specific recombinant allergens, is clinically significant in bronchiectasis.
  • This sensitization is a potentially treatable trait, especially relevant for patients with fewer baseline exacerbations and of Asian descent.
  • Further research into targeted antifungal therapies may benefit this patient subgroup.