To investigate the downstream signal transduction of TmPGRP-SA following infection which leads to NF-κB translocation and induction of immune responses, we determined the expression of 14 AMP genes in larval fat body, gut, and hemocytes of ds TmPGRP-SA- and dsEGFP-treated groups 24 h post-E. The gene discussed is NFKB1; the disease is infection.