Moreover, the results of our study on IL-10 and IFN-γ were consistent with the findings of Peihu Fan et al., but contrary to the findings of Jinyong Zhang et al., and Fan, P et al., We speculate that animal breed, sample source, duration of infection, differences in strain, animal status and infection procedure are the main reasons for the differences in animal data in vitro and in vivo. Here, IFNG is linked to infection.