FOXP3 and enteritis: In the present study, we show that oral inoculation of newly weaned F4 ab/acR− pigs with F4+ ETEC/VTEC/EPEC results in enteritis and excessive systemic inflammatory responses, and that oral administration of either a low or high dose of BLS-mix leads to an increase in the proportion of Foxp3−IL-10+ but not of Foxp3+IL-10+ Treg cells both in the blood as well as the intestinal mucosa of F4 ab/acR− pigs following F4+ ETEC/VTEC/EPEC challenge.