Yes, ABPA Absolutely Causes Wheezing
Wheezing is a cardinal clinical manifestation of allergic bronchopulmonary aspergillosis (ABPA) and represents one of the primary presenting symptoms of this hypersensitivity disorder. 1, 2
Clinical Presentation of ABPA
ABPA typically presents with respiratory symptoms that directly result from the inflammatory airway response to Aspergillus fumigatus colonization:
- Wheezing - a core symptom reflecting bronchospasm and airway inflammation
- Chronic productive cough
- Dyspnea due to uncontrolled asthma
- Expectoration of brownish mucus plugs (characteristic finding)
- Episodic fever 3, 2
The wheezing in ABPA occurs because the condition fundamentally represents uncontrolled asthma driven by the hypersensitivity reaction to fungal antigens. 4, 5
Pathophysiological Basis
The wheezing results from:
- Persistent airway inflammation caused by the complex interplay between A. fumigatus and the host immune response
- Bronchospasm from the allergic/hypersensitivity reaction
- Mucus plugging that obstructs airways
- Bronchiectasis (in more advanced cases) that contributes to airflow limitation 2
Clinical Context and Recognition
A critical pitfall: ABPA is frequently misdiagnosed as recurrent pneumonia, pulmonary tuberculosis, or simple asthma exacerbations, with up to 57% of patients initially misdiagnosed. 6 The presence of wheezing alongside:
- Peripheral eosinophilia
- Markedly elevated total IgE (≥500 IU/mL)
- Central bronchiectasis on imaging
- Brownish mucus plugs
...should immediately trigger consideration of ABPA rather than attributing symptoms solely to asthma or infection. 4, 5, 6
Important Caveats
While wheezing is typical, ABPA can occasionally occur without classic asthmatic symptoms or prior asthma history, though this is less common and represents a diagnostic challenge. 3 However, when present, wheezing remains a key feature requiring aggressive management to prevent progression to irreversible bronchiectasis. 1
The wheezing in ABPA responds to systemic glucocorticoids (prednisolone 0.5 mg·kg⁻¹·day⁻¹) or oral itraconazole, distinguishing it from simple bacterial infections. 1