Related Experiment Video
Updated: Apr 8, 2026
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Detection of Invasive Pulmonary Aspergillosis in Haematological Malignancy Patients by using Lateral-flow Technology
Published on: March 22, 2012
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Does ABPA Contribute to Bronchiectasis? A Structured Evaluation of Competing Hypotheses
Ritesh Agarwal1, Inderpaul Singh Sehgal1, Valliappan Muthu1
1Department of Pulmonary Medicine, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India.
Summary
Allergic bronchopulmonary aspergillosis (ABPA) may cause bronchiectasis, not just colonize damaged airways. Evidence suggests ABPA contributes to lung damage via immune responses, supporting targeted antifungal and anti-inflammatory treatments.
Area of Science:
- Pulmonology
- Immunology
- Mycology
Background:
- The relationship between allergic bronchopulmonary aspergillosis (ABPA) and bronchiectasis is debated.
- Causality is difficult to establish due to host immune responses driving airway damage.
Purpose of the Study:
- To systematically evaluate competing hypotheses on the ABPA-bronchiectasis relationship.
- To determine if ABPA causes bronchiectasis, or if bronchiectasis predisposes to ABPA, or if they share a common cause.
Main Methods:
- Evaluation of radiological, pathological, immunological, temporal, and therapeutic evidence.
- Systematic review of four hypotheses: causality, reverse causation, shared factor, or spurious association.
Main Results:
- ABPA exhibits distinct radiological (central bronchiectasis, high-attenuation mucus), pathological (eosinophilic), and immunological features.
- Antifungal and anti-inflammatory therapies improve ABPA outcomes, arguing against a spurious association.
- Temporal data suggests ABPA often precedes bronchiectasis.
Conclusions:
- ABPA likely contributes to bronchiectasis development through antigen-driven immune injury.
- Host susceptibility is a key factor in this relationship.
- Antifungal and immunomodulatory therapies are supported for selected patients.
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