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Table 4 Serum NA test geometric mean (±SD) results

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
28 56 83 113 125 (DC-1) 132 (DC + 6)
SN antibody inverse titre T01 ND ND ND ND ND ND
T02 ND 4.9 ± 3.5 3.1 ± 3.3 3.9 ± 4.0 4.6 ± 1.4 14.7 ± 4.4
T03 ND 4.5 ± 3.9 2.3 ± 3.0 2.7 ± 2.7 2.3 ± 0.7 16.1 ± 4.8
  Contrast
P value T01 vs T02      0.0149 <.0001
T01 vs T03      NS <.0001
T02 vs T03      NS NS
  1. Titres are expressed as the inverse of the highest dilution at which NA activity is detected. DC day of challenge, ND non-detectable (below limit of detection of the technique), NS non-significant