GATA3 and infection: Although the effect of dietary Trp deficiency on the intestinal epithelium and the fitness of C. rodentium within the lumen itself cannot be ruled out as an explanation for increased susceptibility to infection, these data show that our model of dietary Trp deficiency—that uniquely drives the expansion of Rorγt+ Tregs and decrease of Gata3+ Tregs—still occurs after inflammation.