Pediatrics Which is the most common organism causing chronic lung disease in patients with cystic fibrosis? A Pseudomonas aeruginosa B Burkholderia cepacia C Pleisomonas D Aeromonas 💡 Explanation Which is the most common organism causing chronic lung disease in patients with cystic fibrosis? ✓ Correct Answer: A. Pseudomonas aeruginosa