Figure 6. Production of interleukin-17 by CD4⁺ cells in corneas with Candida albicans keratitis. Mice were subjected to Candida albicans keratitis (CaK) induction and at day 1, the corneas were removed for double immunofluorescence. Cryosections were stained routinely for interleukin (IL)17 (green) and CD4 marker (red), as described in the Methods. Please note that not all IL17-producing cells are CD4⁺.