Table 2.
Pathogenicities of CK/CH/LHLJ/04V P3, P40, P70 and P110 to SPF chickens.
| Passagea | Dose, median embryo infectious doses (log 10)b | Morbidity (%) | Mortality (%) | Antibody (%)c |
|||
|---|---|---|---|---|---|---|---|
| 4d,e | 8 | 12 | 16 | ||||
| P3 | 4.8 | 20/20(100) | 8/20(40) | 0/10(0) | 8/10(80) | 10/10(100) | 10/10(100) |
| P40 | 4.8 | 20/20(100) | 2/20(10) | 0/10(0) | 3/10(30) | 10/10(100) | 10/10(100) |
| P70 | 4.7 | 10/20(50) | 0/20(0) | 0/10(0) | 4/10(40) | 7/10(70) | 9/10(90) |
| P110 | 4.7 | 0/20(0) | 0/20(0) | 0/10(0) | 0/10(0) | 4/10(40) | 4/10(50) |
| Control | – | 0/10(0) | 0/10(0) | 0/10(0) | 0/10(0) | 0/10(0) | 0/10(0) |
a
Twenty-five chicks in groups 1–4 and fifteen chicks in group 5.
b
Dose per chick, 100 μl.
c
Number seroconverted/number inoculated.
e
Days after challenge.