1Barbezange C, Jestin V. Molecular study of the quasispecies evolution of a typical pigeon paramyxovirus type 1 after serial passages in pigeons by contact[J].Avian Pathol, 2005,34:111-122.
2Calnek B W, Barnes H J, Beard C W, et al. Disease of Poultry[M]. Tenth edition. Iowa, USA: Iowa State University, 1997. 541-562.
3Yang C Y, Shieh H K, Lin Y L,etal. Newcastle disease virus isolated from recent outbreaks in taiwan phylogenetically related to viruses (Genotype Ⅶ) from recent outbreaks in Westrern Europe [J]. Avian Disease, 1999,43 : 125 - 130.
4Lomniczim B, Wehmann E, Herczeg J,et al. Newcastle disease outbreaks in recent years in Western Europe were caused by an old (Ⅵ) and a novel genotype (Ⅶ)[J]. Arch Virol,1998,143:49-64.