These findings suggest a distinct pattern of susceptibility to infection by the RVFV-GFP for different immune cells in the following order: CD11b+ CD115+ Ly6G− (macrophages)>CD11c+ CD11b+ MHC II+ (dendritic cells)>CD11b+ CD11c− Ly6G+ (granulocytes). This evidence concerns the gene ITGAM and infection.