Table 5.2.1.
Acute pneumonia: inference of the bacterium responsible from the clinical situation
| Clinical situation | Likely bacterium |
|---|---|
| Previously healthy individual | Streptococcus pneumoniae |
| Complication of viral infection |
Staphylococcus aureus |
| Streptococcus pneumoniae | |
| Chronic bronchitis |
Streptococcus pneumoniae |
| Haemophilus influenzae | |
| Cystic fibrosis |
Staphylococcus aureus |
| Haemophilus influenzae | |
| Pseudomonas aeruginosa | |
| Burkholderia cepacia | |
| Immunosuppression |
Streptococcus pneumoniae |
| Staphylococcus aureus | |
| Pseudomonas aeruginosa | |
| Klebsiella pneumoniae | |
| Anaerobes | |
| Hospital inpatient |
Pseudomonas aeruginosa |
| Enterobacteriaceae spp. | |
| Staphylococcus aureus (often methicillin-resistant) | |
| Bronchial tumour |
Streptococcus pneumoniae |
| Staphylococcus aureus | |
| Anaerobes | |
| Aspiration | Anaerobes |
| Alcoholism | Streptococcus milleri |
| Haemophilus influenzae | |
| Anaerobes | |
| Klebsiella pneumoniae | |