Specific IgG against pigeon serum and pigeon bloom extract in patients with bird fancier's lung and asymptomatic fanciers
| Extracts | Patients | Median | Range | Positive (%) |
| Pigeon serum | Asymptomatic | 252 | 59–188145 | 45 |
| Symptomatic | 19996 | 4134–440970 | 100 | |
| Bloom extract | Asymptomatic | 979 | 505–253443 | 54 |
| Symptomatic | 14718 | 4478–63480 | 100 |