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Table 2 Homologous viral neutralization test (VNT): neutralizing antibodies against the PRRSV MLV vaccine strain

From: Safety and long-lasting immunity of the combined administration of a modified-live virus vaccine against porcine reproductive and respiratory syndrome virus 1 and an inactivated vaccine against porcine parvovirus and Erysipelothrix rhusiopathiae in breeding pigs

  Day of the experiment
  Group 0 21 28 42 147 154
Proportion of positive pigs Homologous VNT (log2 titer)a Rank V 0/6 6/6 6/6 6/6 6/6 6/6
2.5 ± 0.5 3.8 ± 0.4* 4.6 ± 1.2 3.9 ± 1.3 4.0 ± 0.4
(2–3) (3–4) (3–6.6) (2–6.0) (3.6–4.6)
C 0/4 0/4 0/4 0/4 0/4 0/4
  1. Results are expressed as the mean ± standard deviation
  2. aNeutralization titres ≥1:4 (log2 = 2) were considered to be of biological significance
  3. *Statistically significant differences between a given sample and the previous one (p < 0.05) (Friedman test)