Table 2 The pathogenicity of NDV JSD0812 strain in Gaoyou ducks of different ages
From: Experimental infection of duck origin virulent Newcastle disease virus strain in ducks
Age (days) | Inoculation route1 | Inoculation dose | Morbidity (%) (no. diseased/no. inoculated) | Mortality (%) (no. died/no. inoculated) | Mean serum HI titer2 |
|---|---|---|---|---|---|
15 | IM | 5 × 108 ELD50 | 100 (10/10) | 60 (6/10) | 5.40 ± 0.84 |
IN & IO | 5 × 108 ELD50 | 100 (10/10) | 0 (0/10) | 5.25 ± 0.96 | |
30 | IM | 5 × 108 ELD50 | 100 (10/10) | 40 (4/10) | 7.17 ± 0.75 |
IN & IO | 5 × 108 ELD50 | 100 (10/10) | 0 (0/10) | 5.30 ± 0.95 | |
45 | IM | 5 × 108 ELD50 | 100 (10/10) | 10 (1/10) | 6.22 ± 0.97 |
IN & IO | 5 × 108 ELD50 | 50 (5/10) | 0 (0/10) | 6.11 ± 1.05 | |
60 | IM | 5 × 108 ELD50 | 100 (10/10) | 10 (1/10) | 5.90 ± 0.74 |
IN & IO | 5 × 108 ELD50 | 30 (3/10) | 0 (0/10) | 5.22 ± 1.20 | |
110 | IM | 5 × 108 ELD50 | 100 (10/10) | 0 (0/10) | 7.00 ± 1.22 |
IN & IO | 5 × 108 ELD50 | 40 (4/10) | 10 (1/10) | 5.40 ± 1.26 |