Groups
|
Recovery of virus from trachea
No. positive/no. tested
|
% protectiona
|
---|
PBS
|
6/6
|
0
|
JOL2068
|
6/6
|
0
|
JOL2077
|
2/6
|
66.7
|
- Chickens were challenged with virulent IBV strain nasally at 4 weeks post-vaccination. The challenged virus was isolated from the trachea at 6th day post-challenge and the immunoprotection efficacy was assayed.
- aPercent protection was determined as the number of positive chickens/total number of chickens.