MX1 and infection: Regarding ISG mRNA expression, Mx1 level increased by 1.46-fold ± 0.12-fold and 1.49-fold ± 0.19-fold for continuous and post-infection treatment, respectively (Kruskal-Wallis: <0.05 both, respectively), while OAS1 mRNA expression increased by more than twofold in all treated conditions (2.8-fold ± 0.6-fold and 2.1-fold ± 0.3-fold, respectively, Kruskal-Wallis: P < 0.01).