To differentiate between these two scenarios, we measured the systemic GFP-E. coli infection intensity and observed that, at 4 h after infection, the bacterial intensity was similar for all dsRNA treatments, but at 24 h, knockdown of rel2 resulted in a higher infection intensity than treatment with dscaspar or dsbla(ApR) (figure 3c). This evidence concerns the gene LRP1 and escherichia coli infection.