Fig. 1. KYNA level in the serum of EMCV infected piglets. Values represent the mean ± SEM of following: Control (CO, N = 30); EMCV subgroups: O DPI (N = 12); 1 DPI (N = 11); 2 DPI (N = 12); 3 DPI (N = 12); 4 DPI (N = 11). Days post inoculation (DPI). Significance: *P<0.05; **P<0.01; ***P<0.001 compared with CO. One-way ANOVA analyse revealed significant differences in KYNA levels in serum between 5 groups i.e. CO, 0 DPI, 1 DPI, 2 DPI, 3 DPI and 4 DPI (F = 3.50182, P = 0.00642).