FMO2 and infection: According to their expression during infection, we found three subsets of genes: 1) genes whose expression was increased in egl-9 mutants, including C-type lectin genes clec-60, clec-52, and clec-71 (“egl-9-repressed genes”, Figure 3A, G), 2) genes whose expression did not change, such as flavin-containing mono-oxygenase fmo-2 and putative antimicrobial peptide F53A9.8 (“egl-9-independent genes”, Figure 3B, H), and 3) genes whose expression was reduced, including antimicrobials such as lysozymes (ilys-3 and lys-5) and secreted phospholipase Y65B4BR.1 (“egl-9-induced genes”, Figure 3C, I).