These results, together with the reductions in suppressive potency for GFP+(Foxp3+) cells isolated ex vivo from mice at early compared with late time points (Figure 5C), and the critical role for Foxp3+ Tregs in controlling exogenous T cell expansion in response to cognate peptide (Figure 6A and B) clearly illustrate reductions in Treg suppressive potency occur from early to late points during persistent Salmonella infection. Here, FOXP3 is linked to Salmonella Infections.