In addition to increased cell death, flow cytometry analyses of cells in the gates corresponding to low and intermediate staining revealed a decrease in the levels of CD11c and the antigen-presenting molecules CD1c and HLA-DR as well as in the levels of the costimulatory CD83 and CD86 molecules on the surface of DCs after infection with wt bacteria compared to ΔlukAB bacteria (Fig. 6C). This evidence concerns the gene CD86 and infection.