Flow cytometric analysis revealed that the numbers of macrophages (CD90.2−, CD11b+, CD11c+, Gr1−, MHCII+) were unaffected upon IL-22 deficiency (C57BL/6 mice, 0.98 × 106 ± 0.47 × 106; IL-22−/− mice, 1.14 × 106 ± 0.46 × 106 on day 14 post infection). Here, ITGAM is linked to infection.