4Broes A, Fairbrother J M, Lafiviere S, et al. Virulence Properties of Enterotoxigenic Escherchia coli O8:KX105 Strains lsolatred from Diarrheic Piglets [J]. Infect Immun, 1988, 56:241 - 246,
5Orskov I, Orskov F. Serology of Escherichia coli Fimbriae [ J ].Prog Allergy, 1983, 33:80 - 105.
6Solis C A, Sumnao L H, Matin H J A. Treatment of Escherichia coli Induced Diarrhoea in Piglets with Antisecretory Drugs Alone or Combined with Antibacterials[ J]. Pig Vet J, 1993, 30:83 - 88
7AlbinaE,CarratC,Charley B.Interferon-alpha Response to Swine Arterivirus (PoAV),the Porcine Reproductive and Respiratory Syndrome Virus[J].Interferon Cytokine Res,1998,18:485-490.
8Allan G,McNeilly F,Ellis J,et al.Experimental Infection of Colostrum Deprived Piglets with Pordine Circovirus 2 (PCV2) and Porcine Reproductive and Respiratory Syndrome Virus (PRRSV)Potentiates PCV2 Replication[J].Arch Virol,2000,145:2421-2429.
9Allende R,Kutish G F,Laegreid W,et al.Mutations in the Genome of Porcine Reproductive and Respiratory Syndrome Virus Responsible for the Attenuation Phenotype[J].Arch Virol,2000a,145:1149-1161.
10Allende R,Laegreid W W,Kutish G F,et al.Porcine Reproductive and Respiratory Syndrome Virus:Description of Persistence in Individual Pigs Upon Experimental Infection[J].J Virol,2000b,74:10834-10837.
