IFNG and infection: Furthermore, IFN-γ concentrations were elevated in small intestines as well as in MLNs as early as 6 days following CCUG 30485 strain infection (p < 0.005; Fig. 4d; p < 0.005; Fig. 5), but declined back to naive levels until day 16 p.i. (p < 0.005; Fig. 4d; p < 0.05; Fig. 5a).