WC1 + and WC1 neg γδ T lymphocytes in intestinal mucosa of healthy and Mycobacterium avium subspecies paratuberculosis-infected calves.

•Gamma delta T cells are enriched in the distal small intestinal mucosa of healthy calves.•WC1neg cells function in immunosurveillance and during early host-pathogen interactions.•WC1+ cells are recruited after direct experimental Map infection.•Functional studies of these cells will improve our understanding of host defence.