Table 4.
Etiologic agents in 108 CAP patients.a
| Bacterial | 64 |
| Streptococcus pneumoniae | 20 (17)b |
| Haemophilus influenzae | 12 |
| Staphylococcus aureus | 9 (3) |
| Pseudomonas aeruginosa | 6 (1) |
| Klebsiella pneumoniae | 2 (1) |
| E. coli | 2 |
| Mycobacterium avium-intracellulare | 2 |
| Nocardia | 2 (1) |
| Moraxella | 1 |
| Other bacteria | 8 (5) |
| Viral | 44 |
| Rhinovirus | 26 |
| Coronavirus | 7 |
| Parainfluenza virus | 4 |
| Respiratory syncytial virus | 3 |
| Human metapneumovirus | 3 |
| Influenza virus | 1 |
| Fungal (Pneumocystis jiroveci) | 6 |
a
Data are shown as the numbers of potential etiologic agents identified. The total number exceeds the number of infected patients because of cases in which multiple organisms were identified.
b
Under bacterial, numbers of patients with proven infection (isolation of organism from a normally sterile site) are shown in parentheses.