Similarly, we observed an increase in anti-O9 IgM and IgG titers between paired samples following infection with S. Enteritidis (2.4-fold and 3.1-fold, respectively) and other group D Salmonella organisms (6.3-fold and 9.0-fold, respectively; Supplementary Figure 1C and 1D). This evidence concerns the gene CD40LG and infection.