Reduction of viability after infection with either type of bacteria of the Ubiquitin-GAL4;UAS-sid RNAi fly line reached a maximum of ∼60% and co-expression of the UAS-dicer construct further reduced the viability of sid RNAi flies to greater than 75% by seven days post infection (Figures 8B and D). This evidence concerns the gene LGALS4 and infection.