FOXP3 and infection: However, within the abomasal mucosa, the proportions of CD3+ T cells expressing Foxp3 did not change before and after infection suggesting that, rather than being specifically induced by the parasite, the observed Foxp3+ T cell response to T. circumcincta infection during these early stages of infection may reflect a more homeostatic regulatory mechanism within the abomasal cellular immune response to minimize immune-mediated abomasal pathology.