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NDV pathogenicity and stability assays.
| Parental |
NDV/rHR09 |
V4 | La Sota | |||
|---|---|---|---|---|---|---|
| HR09 | Passage 5C | Passage 10 | Passage 15 | |||
| MDTa | 58 | 120 | 110 | 120 | 154 | 105 |
| ICPIb | 1.80 | 0.06 | 0.06 | 0.07 | 0.00 | 0.38 |
Abbreviation: NDV, Newcastle disease virus.
MDT = mean death time (h) assay in 10-day-old SPF chicken embryos.
ICPI = intracerebral pathogenicity index assay in 1-day-old SPF chickens.
Passage 5 = virus was passaged in 10-day-old SPF chicken embryos for 5 times.
