Infection with M. luteus triggered the enhanced expression of all of the antimicrobial peptides assayed (i.e. AttaA, CecA, CecC, DipB, Def, Mtk, Table S6 and Figure 3), as well as molecules involved in the transduction of the immune signal (i.e. spz and Dif, Table S6 and Figure 3). The gene discussed is TNF; the disease is infection.