| Source of sample | No. of samples | No. positive | % positive |
| Poultry environment | 170 | 100 | 58.8 |
| Poultry bird | 136 | 75 | 55.1 |
| Poultry personnel | 68 | 56 | 67.6 |
| Total | 374 | 221 | 59.1 |