Table 2. Identity of pathogens in patients with severe hospital-acquired pneumonia a .
| HAP patients (n = 262) (%) | |
| No detected pathogen | 61 (23.3) |
| Bacteria | 156 (59.5) |
| Staphylococcus aureus | 52 (19.8) |
| Methicillin-susceptible S.aureus | 5 (1.9) |
| Methicillin-resistant S.aureus | 47(17.9) |
| Acinetobacter baumannii | 42 (16.0) |
| Pseudomonas aeruginosa | 29 (11.1) |
| Klebsiella pneumoniae | 22 (8.4) |
| Stenotrophomonas maltophilia | 12 (4.6) |
| Escherichia coli | 6 (2.3) |
| Enterobacter species | 5 (1.9) |
| Streptococcus pneumoniae | 4 (1.5) |
| Unspecified streptococcus species | 2 (0.8) |
| Providencia stuartii | 1 (0.4) |
| Proteus mirabilis | 1 (0.4) |
| Moraxella catarrhalis | 1 (0.4) |
| Legionella species | 1 (0.4) |
| Klebsiella oxytoca | 1 (0.4) |
| Virus | 59 (22.5) |
| Respiratory syncytial virus | 16 (6.1) |
| Type A | 11 (4.2) |
| Type B | 5 (1.9) |
| Parainfluenza virus | 16 (6.1) |
| Type 3 | 15 (5.7) |
| Type 1 | 2 (0.8) |
| Rhinovirus | 15 (5.7) |
| Influenza virus | 10 (3.8) |
| Influenza A | 9 (3.4) |
| Influenza B | 1 (0.4) |
| Cytomegalovirus | 5 (1.9) |
| Human coronavirus | 4 (1.5) |
| Human coronavirus OC43 | 2 (0.8) |
| Human coronavirus 229E/NL63 | 2 (0.8) |
| Bocavirus | 2 (0.8) |
| Human metapneumovirus | 2 (0.8) |
| Adenovirus | 1 (0.4) |
| Other | |
| Aspergillus species | 18 (6.9) |
| Pneumocystis jirovecii | 6 (2.3) |
HAP = hospital-acquired pneumonia.
a
More than one pathogen was detected in some patients.