Analysis of macrophage numbers within Tg(Runx1:cebpb-CG2;mpeg1:EGFP) larvae also suggest that the impact of overexpressing cebpb within HSPCs skews hematopoiesis largely toward the neutrophil lineage, analogous to the observed changes in blood production seen in our infection-driven EG model described here and previously (17). Here, MPEG1 is linked to infection.