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Table 1 Mean (±SD) viral load in serum after challenge and percentage of viraemic pigs

From: Immune response development after vaccination of 1-day-old naïve pigs with a Porcine Reproductive and Respiratory Syndrome 1-based modified live virus vaccine

  Treatment Day of study
125/DC-1 129/DC + 3 132/DC + 6 134/DC + 8 136/DC + 10
Viral load % viraemic pigs Viral load % viraemic pigs Viral load % viraemic pigs Viral load % viraemic pigs Viral load % viraemic pigs
Mean PRRSV viral load T01 ND 0% 6.01 ± 0.3 100% 4.72 ± 0.1 100% 4.21 ± 0.3 100% 5.32 ± 0.8 100%
T02 ND 0% 3.57 ± 0.6 62.5% 2.90 ± 0.5 50% 1.80 ± 0.1 12.5% 2.11 ± 0.5 12.5%
T03 ND 0% 4.74 ± 0.7 87.5% 3.80 ± 0.4 87.5% 2.15 ± 0.3 25% 1.86 ± 0.1 25%
  Contrast
P value T01 vs T02    0.0059 NS 0.0054 NS 0.0016 0.0047 0.0087 0.0047
T01 vs T03    NS NS 0.0458 NS 0.0011 0.0210 0.0096 0.0210
T02 vs T03    NS NS NS NS NS NS NS NS
  1. Values are expressed as log10 PRRSV RNA copies per mL of serum. DC day of challenge, ND non-detectable (below limit of detection of the technique), NS non-significant