CXCL2 and chlamydia infectious disease: In line with the diminished CXCL2 response, at day 5 post-Chlamydia infection, typically when an immune inductive site is developed at the submucosa, we observed a 34-fold increase in the neutrophils and a fivefold increase in the monocytes in wild-type controls, compared to very minimal changes in HK mice, highlighting a significant role for mast cells in the early recruitment of myeloid effector cells.