Immunological dysfunction of children with severe parapneumonic effusion.

Area of Science:

• Pediatrics
• Immunology
• Infectious Diseases

Background:

• Serious pneumococcal infections, though reduced by 13-valent pneumococcal conjugate vaccines (PCV13), still occur.
• Parapneumonic effusion (PPE) is a severe complication of pneumococcal infections requiring medical intervention.

Purpose of the Study:

• To investigate the immunological function of children with severe parapneumonic effusion (PPE).
• To assess immune status during hospitalization and after recovery in pediatric PPE patients.

Main Methods:

• Prospective, single-center study of children with PPE from January 2011 to June 2023.
• Involved thoracic drainage, fibrinolysis, and/or video-assisted thoracoscopic surgery for severe cases.
• Extended immunological testing performed at admission and 6-8 weeks post-discharge.

Main Results:

• 66 PPE episodes identified; 12 patients (24.5%) showed immune dysfunction.
• Diagnoses included human immunodeficiency virus, immunoglobulin A deficiency, mannose-binding lectin deficiency, and specific antibody deficiency.
• Immunocompromised patients had a longer hospitalization duration.

Conclusions:

• Immunological evaluation is crucial for identifying immunodeficiencies in children with PPE, even post-PCV13 vaccination.
• Screening for immune dysfunction in PPE patients is vital despite vaccination.
• Early diagnosis and treatment of immune dysfunction can prevent organ damage and reduce long-term morbidity.