Radiological abnormalities associated with Aspergillus colonization in a cystic fibrosis population

Area of Science:

• Pulmonary Medicine
• Infectious Diseases
• Radiology

Background:

• Cystic Fibrosis (CF) patients are susceptible to respiratory infections.
• Aspergillus species colonization is common in CF airways.
• The clinical impact of Aspergillus colonization on CF lung disease is not fully understood.

Purpose of the Study:

• To investigate the correlation between Aspergillus species sputum colonization and radiological abnormalities in CF patients.
• To assess the relationship between Aspergillus colonization and pulmonary function (FEV1) in CF patients.

Main Methods:

• Prospective evaluation of 32 CF patients.
• High-resolution computed tomography (HRCT) of the thorax and pulmonary function testing (PFT) were performed.
• Patients were grouped based on sputum culture for Aspergillus species (positive n=16, negative n=16).
• A modified Bhalla scoring system was used to assess HRCT scans.

Main Results:

• Aspergillus-positive CF patients exhibited more severe bronchiectasis, particularly in the right upper and lower lobes, compared to Aspergillus-negative patients (p<0.05).
• Total Bhalla scores were clinically significant in both groups, with a trend towards significance between groups (p=0.063).
• No significant difference in pulmonary function (FEV1) was detected between the Aspergillus-positive and Aspergillus-negative groups.

Conclusions:

• Aspergillus colonization in CF patients is associated with greater radiological abnormalities on HRCT.
• These radiological changes are not reflected in standard pulmonary function tests (PFTs).
• Early radiological evaluation is warranted for CF patients colonized with Aspergillus species.