3Aldous E W, Alexander D J. Detection and differentiation of Newcastle disease virus(avian paramyxovirus type 1) [J]. Avi- an Pathol, 2001, 30(2): 117-128.
4Alexander D J. Newcastle disease and other avian paramyxo- viruses[J]. Revue Scientifique et Technique Del Office Interl Des Epizoo, 2000, 19(2): 443-462.
5Liu H L, Wang Z L, Song C P, et al. Characterization of pi- geon-origin Newcastle disease virus isolated in China[J]. Am Asso Avian Pathol, 2006, 50(4) :636-640.
6Ke G M, Liu H J, Lin M Y, et al. Molecular characterization of Newcastle disease viruses isolated from recent outbreaks in Taiwan[J]. J VirolMeth, 2001, 97(1 2): 1-11.
7Lin M Y, Liu H J, Ke G M. Genetic and antigenic analysis of Newcastle disease viruses from recent outbreaks in Taiwan[J]. Avian Pathol,2003, 32(4) : 345-350.
8Miller P J, King D J, Afonso C L, et al. Antigenic differences among Newcastle disease virus strains of different genotypes used in vaccine formulation affect viral shedding after a virulent challenge[J]. Vaccine, 2007, 25(41): 7238-7246.
9Alexander D J. Manual of diagnostic tests and vaccines for ter- restrial animals 5th ed[M]. Office of Internat Des Epizooties: Paris France, 2004.
10Ballagi-Pordany A, Wehamann E, Herczeg J, et al. Identifi cation and grouping of Newcastle disease virus strains by re striction site analysis of a region form the F gene[J]. Arch Virol, 1996, 141(2) :243-261.
