Organisms grown in patients with and without ventilator-associated pneumonia (VAP)
| Organisms | VAP | Non-VAP |
| Streptococcus pneumoniae | 0 | 1 |
| Methicillin-sensitive Staphylococcus aureus | 2 | 2 |
| Methicillin-resistant S aureus | 3 | 6 |
| Coagulase-negative Staphylococcus spp. | 2 | 1 |
| Haemophilus influenzae | 1 | 2 |
| Escherichia coli | 3 | 1 |
| Citrobacter freundii | 1 | 0 |
| Citrobacter koseri | 0 | 1 |
| Enterobacter cloacae | 1 | 2 |
| Acinetobacter baumannii | 0 | 1 |
| Pseudomonas aeruginosa | 0 | 2 |
| Serratia marcescens | 0 | 1 |
| Klebsiella pneumoniae | 0 | 4 |
| Candida albicans | 3 | 2 |
| Aspergillus fumigatus | 1 | 1 |
| Anaerobes | 1 | 0 |