IL17A and Salmonella Infections: Since we identified IFN-γ expression from IL-17A+IL-22+ and IL-17A+IL-22+ CD4+ T cells using gene expression analysis, we aimed to analyze whether all SFB-induced Th17 cells co-produce IFN-γ or whether this is potentially specific for certain subpopulations during bystander activation after Salmonella infection.