For cecropin B, gambicin, and transferrin, a posteriori contrasts confirmed that the enhanced gene expression resulted from the exposure to the LPS rather than from the physical stress induced by (or the opportunistic infections that come with) mosquito injection (significant Ringer-LPS contrast, cecB: χ12 = 19.97, P < 0.001; gamb: χ12 = 18.50, P < 0.001; transf: χ32 = 63.62, P < 0.001). Here, TF is linked to Opportunistic infection.