Table 3.
Etiology of Community-Acquired Pneumonia, Studies Since 2010
| Pathogen | Percentage of Patients | ||
|---|---|---|---|
| Houston [33] | Centers for Disease Control and Prevention [34] | Netherlands [136] | |
| Bacteria | 29 | 15 | 30 |
| Streptococcus pneumoniae | 9 | 5 | 16 |
| Haemophilus | 6 | <1 | 7 |
| Staphylococcus aureus | 5 | 2 | 3 |
| Pseudomonas | 3 | <1 | 2 |
| Legionella | 1 | 1 | 1 |
| Mycoplasma, Chlamydia | – | <3 | 1 |
| Other | 6 | 3 | 3 |
| Nocardia | 1 | 0 | 0 |
| Mycobacteria | 2 | 1 | <1 |
| Fungi (Pneumocystis) | 3 | 1 | 2 |
| Viruses | 20 | 27 | 3 |
| Rhinovirus | 13 | 9 | – |
| Coronavirus | 3 | 2 | – |
| Human metapneumovirus | 2 | 4 | – |
| Influenza | 1 | 6 | 3 |
| Parainfluenza | 2 | 3 | – |
| Respiratory syncytial virus | 2 | 3 | – |
| No pathogen | 55 | 62 | 66 |