Table 1.
Clinical signs in single or mixed IBV and AIV-H9N2 infected commercial broiler chicks.
| Challenge virus/es | Head shaking & sneezing |
Mouth breathing & rales |
Conjunctivitis |
||||||
|---|---|---|---|---|---|---|---|---|---|
| 2DPIa | 5DPI | 7DPI | 2DPI | 5DPI | 7DPI | 2DPI | 5DPI | 7DPI | |
| G1-negative control | – | – | – | – | – | – | – | – | – |
| G2-variant IBV | 2b | 2 | 2 | – | 1 | 1 | – | 2 | 3 |
| G3-classical IBV | – | 4 | 3 | – | – | – | 1 | 1 | 1 |
| G4-AIV-H9N2 | – | 1 | 2 | – | 1 | 1 | – | 1 | 2 |
| G5-AIV-H9N2 + variant IBV | – | 3 | 3 | – | 2 | 2 | – | 2 | 3 |
| G6-AIV-H9N2 + classical IBV | 2 | 3 | 4 | – | 1 | 1 | 2 | 2 | 3 |
| G7-AIV-H9N2 + 4/91 IBV vaccine | – | 4 | 4 | – | 2 | 2 | – | 2 | 2 |
a
DPI; days post infection.
b
Numbers of affected chicks out of 15 inoculated.