Table 1.

Origins of virus strains tested in this study.

Virus name	Strain name	Country of isolation	Year of isolation
PPV	S-1	China	1983 (Pan et al., 1983)
PPV	S-2	China	1985 (Pan et al., 1985)
PPV	NJ	China	2012 (Zhang et al., 2012)
CSFV	C	China	1955−1956(Wang et al., 2000)
PCV2	SH	China	2006 (Guo et al., 2010)
PRV	Bartha K61	Hungary	1961 (Yuan et al., 1983)
PRRSV	ATCC VR2332	USA	1992 (Collins et al., 1992)