Adenovirus pneumonia in infants and factors for developing bronchiolitis obliterans: a 5-year follow-up

Area of Science:

• Pediatric Pulmonology
• Infectious Diseases
• Respiratory Medicine

Background:

• Adenovirus pneumonia is a common cause of hospitalization in infants.
• Bronchiolitis obliterans (BO) is a potential long-term complication of severe viral pneumonia.
• Understanding risk factors for BO is crucial for early intervention.

Purpose of the Study:

• To detail the clinical, pulmonary function, and imaging outcomes in infants with adenovirus pneumonia over a 5-year period.
• To identify factors associated with the development of bronchiolitis obliterans (BO) post-adenovirus pneumonia.
• To characterize the long-term respiratory profiles of affected children.

Main Methods:

• Prospective cohort study of 45 hospitalized infants with adenovirus pneumonia.
• 5-year follow-up including pulmonary function testing (impulse oscillometry technique - IOS) and chest tomography.
• Comparison of clinical and functional parameters between children who developed BO and those who did not.

Main Results:

• Nearly half (47.4%) of the infants developed BO within 5 years.
• Children who developed BO experienced more severe respiratory compromise during their initial pneumonia (e.g., ICU admission, mechanical ventilation).
• Abnormal lung function (higher impedance measures) was significantly more common in children with BO.

Conclusions:

• Severe respiratory compromise during adenovirus pneumonia is a key risk factor for developing bronchiolitis obliterans.
• Adenovirus pneumonia presents a spectrum of severity, with severe cases posing a higher risk for long-term lung damage.
• Early identification of high-risk infants is essential for managing potential long-term respiratory sequelae.