Table 6. Airborne transmission study of 9 representative isolates.
The number of chickens shedding/total number of chickens.
| A | ||||||||||||||||
| Strains | SD/C9QH/11 group | JS/JT12/11 group | JS/YZ618/12 group | JS/YZ640/12 group | ||||||||||||
| Trachea | Cloacal | Trachea | Cloacal | Trachea | Cloacal | Trachea | Cloacal | |||||||||
| Virus shedding on day | 3 | 5 | 3 | 5 | 3 | 5 | 3 | 5 | 3 | 5 | 3 | 5 | 3 | 5 | 3 | 5 |
| Inoculated | 3/3 | 2/3 | 0/3 | 0/3 | 3/3 | 3/3 | 2/3 | 0/3 | 3/3 | 3/3 | 1/3 | 2/3 | 3/3 | 3/3 | 2/3 | 1/3 |
| Direct contact | 3/3 | 2/3 | 1/3 | 1/3 | 3/3 | 2/2 | 1/3 | 0/2 | 2/3 | 3/3 | 1/3 | 1/3 | 0/1 | 1/1 | 1/1 | 1/1 |
| Airborne contact | 2/3 | 3/3 | 0/3 | 1/3 | 1/3 | 0/3 | 0/3 | 0/3 | 1/3 | 0/3 | 0/3 | 0/3 | 2/3 | 2/3 | 0/3 | 0/3 |
| B | ||||||||||||||||
| Strains | JS/TM58/13 group | JS/JT95/13 group | JS/TM71/14 group | AH/WB/14 group | ||||||||||||
| Trachea | Cloacal | Trachea | Cloacal | Trachea | Cloacal | Trachea | Cloacal | |||||||||
| Virus shedding on day | 3 | 5 | 3 | 5 | 3 | 5 | 3 | 5 | 3 | 5 | 3 | 5 | 3 | 5 | 3 | 5 |
| Inoculated | 3/3 | 3/3 | 2/3 | 1/3 | 3/3 | 1/3 | 1/3 | 0/3 | 3/3 | 3/3 | 1/3 | 0/3 | 3/3 | 3/3 | 1/3 | 2/3 |
| Direct contact | 3/3 | 2/3 | 0/3 | 1/3 | 2/2 | 2/2 | 1/2 | 1/2 | 3/3 | 3/3 | 1/3 | 1/3 | 1/3 | 1/3 | 0/3 | 1/3 |
| Airborne contact | 1/3 | 2/3 | 0/3 | 1/3 | 1/3 | 1/3 | 0/3 | 0/3 | 1/3 | 0/3 | 0/3 | 0/3 | 1/3 | 0/3 | 2/3 | 0/3 |