3Bilodeau R,Dea S,Martineau GP. Porcine reproductive and respiratory syndrome in Quebec[J].Veterinary Record,1991.102-103.
4Christianson W T,Collins J E,Benfield D A. Experimental reproduction of swine infertility and respiratory syndrome in pregnant sows[J].American Journal of Veterinary Research,1992.485-488.
5殷震;刘景华.动物病毒学[M]北京:科学出版社,1997588-629.
6Conzelmann K K,Visser N,Van Woensel P. Molecular characterization of porcine reproductive and respiratory syndrome virus,a member of the Arterivirus group[J].Virology,1993.329-339.
7Mateu E,Diaz I,Darwich L. Evolution of ORF5 of Spanish porcine reproductive and respiratory syndrome virus strains from 1991 to 2005[J].Virus Research,2006,(2):198-206.doi:10.1016/j.virusres.2005.09.008.
8Wensvoort G,Terpstra C,Pol G M. Mystery swine disease in the Netherlands:the isolation of Lelystad virus[J].Veterinary Quarterly,1991.121-130.
