TABLE 2.
Pathogens Associated With Pneumonia
| Pathogen | No. | % |
|---|---|---|
| Antibiotic-susceptible bacteria (n = 1,940) | ||
| Methicillin-susceptible Staphylococcus aureus | 505 | 26.0 |
| Haemophilus influenzae | 324 | 16.7 |
| Streptococcus pneumoniae | 222 | 11.4 |
| Other Streptococci species | 475 | 24.5 |
| Klebsiella pneumoniae | 184 | 9.5 |
| Escherichia coli | 177 | 9.1 |
| Haemophilus parainfluenzae | 100 | 5.2 |
| Moraxella catarrhalis | 86 | 4.4 |
| Klebsiella oxytoca | 66 | 3.4 |
| Other Haemophilus species | 24 | 1.2 |
| Legionella species | 9 | 0.5 |
| Bordetella bronchiseptica | 6 | 0.3 |
| Neisseria species | 5 | 0.3 |
| Other Klebsiella species | 3 | 0.2 |
| Eikenella corrodens | 2 | 0.1 |
| Other Moraxella species | 2 | 0.1 |
| Pasteurella multocida | 1 | 0.1 |
| Potentially antibiotic-resistant bacteria (n = 2,991) | ||
| Pseudomonas aeruginosa | 1,176 | 39.3 |
| Methicillin-resistant Staphylococcus aureus | 1,016 | 34.0 |
| Enterobacter species | 304 | 10.2 |
| Acinetobacter species | 219 | 7.3 |
| Stenotrophomonas maltophilia | 208 | 7.0 |
| Serratia species | 142 | 4.7 |
| Proteus species | 78 | 2.6 |
| Citrobacter species | 64 | 2.1 |
| Achromobacter species | 62 | 2.1 |
| Extended-spectrum β-lactamase producing Enterobacteriaceae | 47 | 1.6 |
| Burkholderia cepacia | 35 | 1.2 |
| Nocardia species | 25 | 0.8 |
| Other gram-negative bacteria | 24 | 0.8 |
| Providencia species | 12 | 0.4 |
| Hafnia alvei | 8 | 0.3 |
| Carbapenemase-producing Klebsiella species | 6 | 0.2 |
| Morganella morganii | 5 | 0.2 |
| Respiratory viruses (n = 261) | ||
| Herpes simplex virus | 82 | 31.4 |
| Cytomegalovirus | 65 | 24.9 |
| Influenza A | 49 | 18.8 |
| Parainfluenza | 40 | 15.3 |
| Rhinovirus | 34 | 13.0 |
| Respiratory syncytial virus | 21 | 8.0 |
| Adenovirus | 20 | 7.7 |
| Human metapneumovirus | 11 | 4.2 |
| Influenza B | 8 | 3.1 |
| Coronavirus | 2 | 0.8 |
More than one listed pathogen could be present within each category.