Table 3. Frequency of bacterial isolates from the endotracheal aspirates of 69 ICU patients with VAT based on the cause of admission (X2 Pearson Monte Carlo test = 47.36, p-value < 0.001).
| Classification pathogen | Surgical | Medical | Overall | |
|---|---|---|---|---|
| Gram-negative cocci | Acinetobacter baumannii | - | 17 (45.9) | 17 (24.6) |
| Moraxella catarralis | - | 1 (2.7) | 1 (1.4) | |
| Gram-negative bacilli | Pseudomonas aeruginosa | 11 (34.3) | 3 (8.1) | 14 (20.2) |
| Enterobacter | 8 (25.0) | 1 (2.7) | 9 (13.0) | |
| Proteus vulgaris | 4 (12.5) | - | 4 (5.7) | |
| Escherichia coli | 2 (6.2) | 1 (2.7) | 3 (4.3) | |
| Klebsiella pneumoniae | 1 (3.1) | 2 (5.4) | 3 (4.3) | |
| Citrobacter freundii | - | 2 (5.4) | 2 (2.8) | |
| Klebsiella pneumoniae + Escherichia coli | - | 1 (2.7) | 1 (1.4) | |
| Klebsiella oxytoca | 1 (3.1) | - | 1 (1.4) | |
| Gram-negative cocci and bacilli Acinetobacter + Klebsiella pneumoniae |
- | 4 (10.8) | 4 (5.7) | |
| Gram-positive cocci | Staphylococcus aureus | 1 (3.1) | 4 (10.8) | 5 (7.2) |
| Staphylococcus epidermidis | 4 (12.5) | - | 4 (5.7) | |
| Streptococcus viridians | - | 1 (2.7) | 1 (1.4) | |
| Total | 32 (100.0) | 37 (100.0) | 69 (100.0) | |
ICU: intensive care unit; VAT: ventilator-associated tracheobronchitis.