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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
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