TABLE 1.
The nine pathogens most frequently identified in samples from patients with nosocomial pneumoniaa
| Pathogen | No. (%) of isolates identified on the basis of:
|
|
|---|---|---|
| All materials sent for microbiological investigation (n = 11,285) | Quantitative cultures of BAL specimens only (n = 1,609) | |
| S. aureus | 2,718 (24.1) | 450 (28.0) |
| P. aeruginosa | 1,837 (16.3) | 318 (19.8) |
| K. pneumoniae | 1,305 (11.6) | 159 (9.9) |
| E. coli | 1,137 (10.1) | 187 (11.6) |
| Enterobacter spp. | 937 (8.3) | 148 (9.2) |
| S. pneumoniae | 671 (6.0) | 97 (6.0) |
| Haemophilus spp. | 509 (4.5) | 72 (4.5) |
| Acinetobacter spp. | 493 (4.4) | 77 (4.8) |
| S. maltophilia | 308 (2.7) | 64 (4.0) |
a
From KISS, 1997 to 2004.