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Table 1 Virus isolation results from the serum samples of piglets inoculated with the rescued viruses

From: ORF1a of highly pathogenic PRRS attenuated vaccine virus plays a key role in neutralizing antibody induction in piglets and virus neutralization in vitro

Groups Pig no. Weeks post-inoculation
0 1 2 3 4 5 6 7 8 9 10
rHuN4-F112 inoculated group #11 -a +b + +
#12 + +
#13 + + +
#14 + +
#15 + +
#16 + + +
rHuN4-F112-C1a inoculated group #21 +
#22
#23
#24 +
rHuN4-F112-C1b inoculated group #31 +
#32
#33
rHuN4-F112-C27 inoculated group #41
#42 +
#43
#44
rCH-1R inoculated group #51
#52
#53
rCH-1R-H1a inoculated group #61 + + +
#62
#63
rCH-1R-H1b inoculated group #71
#72 +
#73
rCH-1R-H27 inoculated group #81
#82
#83
Control group #91
#92
#93
#94
  1. a “-” indicates that the virus was not isolated in the serum sample
  2. b “+” indicates that the virus was isolated in the serum sample