Organisms isolated in sputum according to radiological diagnosis
| Organism | Exacerbation | Pneumonia |
| Haemophilus influenzae | 20 (2.84%) | 10 (4.26%) |
| Streptococcus pneumoniae | 8 (1.14%) | 9 (3.83) |
| Moraxella catarrhalis | 3 (0.43%) | 0 (0%) |
| Pseudomonas aeruginosa | 35 (4.98%) | 17 (7.23%) |
| Klebsiella species | 2 (0.28 | 5 (2.13%) |
| Other Gram-negative bacteria | 59 (8.39%) | 23 (9.79%) |
| Escherichia coli | 17 (2.4%) | 9 (3.83%) |
| Coliform species | 32 (4.55%) | 11 (4.68%) |
| Enterobacter species | 1 (0.14%) | 2 (0.85) |
| Proteus species | 2 (0.28%) | 1 (0.43%) |
| Stenotrophomonas species | 2 (0.28%) | 0 |
| Serratia species | 2 (0.28%) | 0 |
| Staphylococcus aureus | 1 (0.14%) | 0 |
| Total | 15.0% | 28.0% |