Table 7.
Results of IBV serological evaluation in E. coli–vaccinated and control, not vaccinated, birds at F1 and F2 during experiment 1.
| Farm | Week | Parameter | Chicken house |
|
|---|---|---|---|---|
| Vaccinated | not vaccinated | |||
| F1 | 3 | Gmean | ND1 | ND1 |
| CV% | ND1 | ND1 | ||
| 6 | Gmean | 1.392 | 1.201 | |
| CV% | 77.8 | 68.7 | ||
| F2 | 3 | Gmean | 140 | 143 |
| CV% | 169.9 | 113.4 | ||
| 6 | Gmean | 1.373 | 1.585 | |
| CV% | 61.5 | 74.5 | ||
All the birds (both E. coli–vaccinated and not vaccinated) were vaccinated on day 1 with live, attenuated H-120 and 1/96 IBV vaccines via coarse spray in the hatchery. Escherichia coli–vaccinated birds were vaccinated against E. coli on a farm right after their placement in the appropriate chicken house. 15 minutes after E. coli vaccination birds were released from transport boxes.
Abbreviation: E. coli, Escherichia coli.
1
Not done.