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Organisms identified in empyema and pleural effusion specimens from China, Korea, Taiwan and Vietnam, 1995–2005.
| Cultured Organism | Empyema N (%) | Pleural effusion N (%) | Total N (%) |
| Culture negative | 122 (39) | 858 (80) | 980 (71) |
| Gram negative | 51 (17) | 104 (10) | 155 (11) |
| Gram positive | |||
| S. pneumoniae | 68 (22) | 15 (1) | 83 (6) |
| Others | 69 (22) | 92 (9) | 161 (12) |
| Total | 310 (100) | 1,069 (100) | 1,379 (100) |
