Bacteriology of community-acquired and hospital-acquired pleural infection2
| Common organisms | |
| Community-acquired | Streptococcus spp. (∼52%) |
| ▶ S milleri | |
| ▶ S pneumoniae | |
| ▶ S intermedius | |
| Staphylococcus aureus (11%) | |
| Gram-negative aerobes (9%) | |
| ▶ Enterobacteriaceae | |
| ▶ Escherichia coli | |
| Anaerobes (20%) | |
| ▶ Fusobacterium spp. | |
| ▶ Bacteroides spp. | |
| ▶ Peptostreptococcus spp. | |
| ▶ Mixed | |
| Hospital-acquired | Staphylococci |
| ▶ Meticillin-resistant S aureus (MRSA) (25%) | |
| ▶ S aureus (10%) | |
| Gram-negative aerobes (17%) | |
| ▶ E coli | |
| ▶ Pseudomonas aeruginosa | |
| ▶ Klebsiella spp. | |
| Anaerobes (8%) |