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Mild, Moderate, and Severe Forms of Allergic Bronchopulmonary Aspergillosis^*

A Clinical and Serologic Evaluation

^* From the Department of Respiratory Medicine, Vallabhbhai Patel Chest Institute, University of Delhi, Delhi, India.

Correspondence to: Raj Kumar, MD, 44/1, Probyn Rd, Dehli University Campus, Delhi-7, India; e-mail: rajneel44{at}rediffmail.com

Background: Allergic bronchopulmonary aspergillosis (ABPA) is a hypersensitivity disorder induced by Aspergillus species colonizing the bronchial tree. There are patients with asthma who fulfill the diagnostic criteria of ABPA by serologic evaluation (specific IgE/IgG to Aspergillus fumigatus), bronchography, CT, and or conventional linear tomography.

Objective: To identify different forms of ABPA based on various diagnostic criteria.

Methods: Eighteen patients with asthma fulfilling the criteria of ABPA were evaluated in the present study. Six patients each received a diagnosis of ABPA serologic positive (ABPA-S), ABPA with central bronchiectasis (ABPA-CB), and ABPA with central bronchiectasis and other radiologic features (ABPA-CB-ORF).

Results: The spirometric changes in the ABPA-S group (group 1) were mild, in the ABPA-CB group (group 2) were moderate, and in the ABPA-CB-ORF group (group 3) were severe. Absolute eosinophil count was raised in each group but was maximum (1,233 µL) in severe form of disease (group 3). Specific IgE against A fumigatus was raised in each group, and the maximum was 47.91 IU/mL in ABPA-CB-ORF. CT scan findings of the ABPA-S group were normal without central bronchiectasis. The exacerbation in symptoms was maximum in group 3 compared to other groups.

Conclusion: The present observations suggest that ABPA includes mild (ABPA-S), moderate (ABPA-CB), and severe (ABPA-CB-ORF) forms of disease. It is recommended, therefore, that the disease should be diagnosed early, treated at the mild form of disease (ABPA-S), and prevented from leading to ABPA-CB or ABPA-CB-ORF.

Key Words: allergic bronchopulmonary aspergillosis • enzyme-linked immunosorbent assay • specific IgE/IgG • type III hypersensitivity

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