Article
Properties of non-neurovirulent plaque-forming mutants of Newcaslte disease virus.
Avian diseases - 1 Jan 2000
Lomniczi B
Abstract excerpt
The mesogenic Hertfordshire (H) strain, a vaccine strain of Newcastle disease virus, represents a heterogeneous virus population differing in physical, chemical, and biological properties. Small (S) and large (L) plaque-forming mutants were isolted from strain H in chick embryo fibroblast cell cultures. Part of the S mutants lacked neurovirulence, with an intracerebral pathogenicity index for day-old chicks of 0...
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