Groups of 5 C57BL/6 mice or CCR2 KO mice having received Gr1-depleting antibody were infected with either 103or 107 NMII Coxiella. The CCR2 KO mice that received Gr1-depleting antibody were anticipated to lack the ability to recruit either inflammatory monocytes or neutrophils to the site of infection. This evidence concerns the gene CCR2 and infection.