To investigate the impact of IL-23 on IL-17A production by the three distinct cellular subsets during OPC, we infected Il23a-/- animals in comparison to WT controls and assessed the changes in absolute numbers of IL-17A producing CD90+ cells and the corresponding TCRβ+, TCRγδ+ and ILC subsets in the tongue on day 1 post infection. The gene discussed is THY1; the disease is infection.