Figure 5. Persistent CD4⁺ and CD8⁺ T-cell infiltrates in HLA-B27/DKO corneas. Central corneas from debrided animals at day 14 were stained with antibodies raised against CD4 and CD8. WT (A, D) and DKO (B, E) eyes were largely negative at this time, but HLA-B27/DKO corneas (C, F) retained strongly positive cells for both markers (arrowheads). (n = 4 animals, bar indicates 50 μM).