Graphic representation of the chromosomal genes found in this study as part of S . Enteritidis Dispensable Genome (233 genes). In blue, genes present in the S. Enteritidis PT4 P125109 chromosome and predicted as absent in the test strain. In red, genes absent in the S. Enteritidis PT4 P125109 chromosome and predicted as present in the test strain. In white, genes present or absent in both reference and test strains. Only those isolates for which any divergence is predicted are shown. S. Enteritidis PT4 P125109 results are shown as reference.