In accordance with previous results7, 17, we observed at day 5 post infection an accumulation of Ly6C+ inflammatory monocyte-derived myeloid cells consisting of CD11b + CD11c− inflammatory monocytes (IM) and CD11b+CD11c+ inflammatory dendritic cells (IDC), coupled with a decrease of the macrophage (CD11b+Ly6C−) population. This evidence concerns the gene ITGAM and infection.