IL6 and Salmonella Infections: At 23 dpi, Salmonella infection resulted in a significant downregulation of IL6 in Subgroups II (p < 0.01) and IV (p < 0.001), and the gene expression in Subgroup III remained at the level of Subgroup I. Application of the phytobiotic reduced the expression level of IL8L2 in Subgroup III (p ≤ 0.01), whereas in Subgroup II it was unchanged and IV it reverted to that in Subgroup I. Overall, expression of the two interleukin genes tended to lower in Subgroups II to IV if we compared their dynamics by 23 dpi.