Table 4.
Positive samples for one or more viruses obtained from broiler chickens, breeders, and layer hens and the respective age in weeks at chicks which were detected.
| Broiler chickens | Broiler breeders | Pullet/layer hens | |||
|---|---|---|---|---|---|
| Weeks | Number of positive samples | Weeks | Number of positive samples | Weeks | Number of positive samples |
| 1 | 27 | 1 | 3 | 4 | 1 |
| 2 | 32 | 8 | 1 | 8 | 1 |
| 3 | 31 | 12 | 1 | 13 | 2 |
| 4 | 33 | 23 | 1 | 23 | 1 |
| 5 | 20 | 31 | 1 | 24 | 1 |
| 6 | 33 | 32 | 2 | 31 | 1 |
| 7 | 17 | 33 | 2 | 48 | 1 |
| 34 | 1 | 93 | 2 | ||
| 35 | 1 | 106 | 1 | ||
| 37 | 3 | ||||
| 40 | 2 | ||||
| 45 | 1 | ||||
| 51 | 1 | ||||
| 57 | 1 | ||||
| 58 | 1 | ||||
|
| |||||
| Total | 193 (85.4%) | Total | 22 (9.7%) | Total | 11 (4.9%) |
% of samples positive for each type of bird (n = 226).