Epstein-Barr virus (EBV) analysis of pleural fluid and serum
| Positive EBV PCR on PF | Negative EBV PCR on PF | |
| PF EBV PCR | 24 | 36 |
| PF EBV load geq·mL−1 | ||
| Mean | 11554 | 0 |
| Median | 454 | |
| Range | 36–163446 | |
| Serum EBV PCR | ||
| Positive | 6 | 0 |
| Negative | 12 | 26 |
| Serum EBV load geq·mL−1 | 0 | |
| Mean | 2209 | |
| Median | 89 | |
| Range | 52–12832 | |
| EBV serology | ||
| Naive | 0 | 3 |
| Acute infection | 0 | 0 |
| Past infection | 18 | 23 |
PF: pleural fluid; geq: genome equivalent.