IFNG and infection: Chemokine receptor expression has not been characterized for bovine NKT cells but the production of IFN-γ by human NKT has been shown to provide a positive feedback mechanism that enhances further NKT cell recruitment through induction of chemokines (38) Peak IFN-γ production following BHV-1 infection occurs on day 5 pi and this coincides with maximum recruitment of non-conventional T-cells (Figure 2).