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Table 2 Mean (±SD) viral load in nasal swabs after challenge and percentage of shedder 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 % shedder pigs Viral load % shedder pigs Viral load % shedder pigs Viral load % shedder pigs Viral load % shedder pigs
Mean PRRSV viral load T01 ND 0% 5.56 ± 0.7 100% 4.53 ± 0.5 100% 2.07 ± 0.3 20% 2.10 ± 0.4 20%
T02 ND 0% 2.21 ± 0.6 12.5% 2.64 ± 0.4 37.5% ND 0% 2.03 ± 0.3 25%
T03 ND 0% 3.72 ± 0.6 62.5% 3.19 ± 0.4 62.5% 2.06 ± 0.2 25% 2.52 ± 0.3 37.5%
  Contrast
P value T01 vs T02    0.0019 0.0047 0.0119 NS NS NS NS NS
T01 vs T03    NS NS NS NS NS NS NS NS
T02 vs T03    NS NS NS NS NS NS NS NS
  1. Values are expressed as log10 PRRSV RNA copies per mL. DC day of challenge, ND non-detectable (below limit of detection of the technique), NS non-significant