作者: P. H. Russell , A. C. R. Samson , D. J. Alexander
DOI: 10.1007/978-1-4757-9271-3_12
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摘要: Variation among Newcastle disease variations (NDV) strains has traditionally been by functional tests, e.g., virulence, thermostability of the hemagglutinin, plaguing ability. recently described at genetic level gene cloning and antigenic monoclonal antibodies (MAb); in this chapter we discuss these two factors separately.