Cleavage site sequence of parental and recombinant APMV-4 viruses and pathogenicity in MDT and ICPI assays.
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aMean embryo death time (MDT): the mean time (h) for the minimum lethal dose of virus to kill all of the inoculated embryos. Pathotype definition: virulent strains, 90 h.bIntracerebral pathogenicity index (ICPI): pathogenicity of NDV in 1-day-old SPF chicks following intracerebral inoculation. Pathotype definition: virulent strains, 1.5–2.0; intermediate virulent strains, 0.7–1.5; and avirulent strains, 0.0–0.7.
创建时间：
2015-12-02
