4Geldhof M F. Antibody response and maternal immunity upon boosting PRRSV-immune sows with experimental farm-specific and commercial PRRSV vaccines[J]. Vet Microbiol, 2013, 167 (27) :260-271.
5Plagemann P G. Peptide ELISA for measuring antibodies to N- protein of porcine reproductive and respiratory syndrome virus [J].J Virol Meth,2006,134:99-118.
6Tian H, Hou X M, Wu J Y, et ai. A promising multiple-epitope re- combinant vaccine against classical swine fever virus [J]. Vet Im- munol Immunopathol, 2014,157 (15) : 59-64.
7Tarradas J, Monso M, Fraile L, et al. A T-cell epitope on NS3 non- structural protein enhances the B and T cell responses elicited by dendrimeric constructions against CSFV in domestic pigs [J]. Vet Immunol Immunopathol, 2012,150 (15) : 36-46.
8Costers S, Vanhee M. GP4-specific neutralizing antibodies might be a driving force in PRRSV evolution [J]. Virus Res, 2010,154: 104-113.
9Zhou L,Ni Y Y,Pineyro P,et al. DNA shuffling of the GP3 genes of porcine reproductive and respiratory syndrome virus (PRRSV) produces a chimeric virus with an improved cross-neutralizing abil- ity against a heterologous PRRSV strain [J]. Virology, 2012,434 (5) :96-109.
10Sehgal D,Vijay I K. A method for the high efficiency of water- soluble carbodiimide- mediated amidation[J].Anal Biochem, 1994,218(1) :87-91.