Table 4 The determination of the ELD 50 of the H9N2/chicken/Shandong/2011 isolate
From: Co-infection of broilers with Ornithobacterium rhinotracheale and H9N2 avian influenza virus
Group | No. | Volumes | Dilutions | No. Mortality | Mortality (%) |
|---|---|---|---|---|---|
1 | 10 | 0.2 | 10-6 | 10 | 10/10 |
2 | 10 | 0.2 | 10-7 | 10 | 10/10 |
3 | 10 | 0.2 | 10-8 | 4 | 4/10 |
4 | 10 | 0.2 | 10-9 | 0 | 0/10 |
5 | 10 | 0.2 | control | 0 | 0/10 |