Group | No. of chickens | Age (d) | Vaccine | Route | Challenge | Route and dose of challenge | |
---|---|---|---|---|---|---|---|
Day 21 | Day 35 | ||||||
A | 10 | 1 | Ma5b | Oculo-nasally | IBV strain SD | – | Oculo-nasally, 106 EID50/bird, 0.2 mL |
B | 10 | 1 | LDT3-Ab | Oculo-nasally | IBV strain SD | – | Oculo-nasally, 106 EID50/bird, 0.2 mL |
C | 10 | 1 | QXb | Oculo-nasally | IBV strain SD | – | Oculo-nasally, 106 EID50/bird, 0.2 mL |
D | 10 | 1 | Ma5 + H120c | Oculo-nasally | – | – | Oculo-nasally, 106 EID50/bird, 0.2 mL |
E | 10 | 1 | LDT3-A + H120c | Oculo-nasally | – | IBV strain SD | Oculo-nasally, 106 EID50/bird, 0.2 mL |
F | 10 | 1 | QX + H120c | Oculo-nasally | – | IBV strain SD | Oculo-nasally, 106 EID50/bird, 0.2 mL |
G | 10 | 1 | QX + QXd | Oculo-nasally | – | IBV strain SD | Oculo-nasally, 106 EID50/bird, 0.2 mL |
H | 10 | 1 | PBS | Oculo-nasally | IBV strain SD | – | Oculo-nasally, 106 EID50/bird, 0.2 mL |
I | 10 | 1 | PBS + PBS | Oculo-nasally | – | IBV strain SD | Oculo-nasally, 106 EID50/bird, 0.2 mL |
J | 10 | 1 | – | – | – | – | Oculo-nasally, PBS, 0.2 mL |