2Ohmann H B,Bloch B.Electron microscopic studies of bovine viral diarrhea virus in tissues of diseased calves and in cell cutures[J].Arch Virol,1982,71:57-74.
3Collett M S,Larson R,Gold C,et al.Molecular cloning and nucleotide sequence of the pestivirus bovine viral diarrhea virus [J].Virol,1988,165:191-199.
4Chu H J,Zee Y C.Morphology of bovine viral diarrhea virus[J].Am J Vet Res,1984,45:845-850.
5Moenning V,Frey H R,Lieber E,et al.Reproduction of mucosal disease with cytopathogenic bovine viral diarrhea virus selected in vitro[J].Vet Rec,1990,127:200-203.
6David G P,Craw Shaw T R,Gunning R F,et al.Severe disease in adult dairy cattle in three U.K dairy herds associated with bovine viral diarrhea virus infection[J].Vet Rec,1994,134:468-472.