The percentages of IFNγR2- and T-bet-expressing CD4+ T cells were increased in both groups on day 7 post-infection compared to day 3 post-infection; however, the percentages of IFNγR2+ and T-bet+ CD4+ T cells were markedly reduced in the FeD mice on day 7 post-infection (Fig. 7A-D). This evidence concerns the gene CD4 and infection.