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Phylogeny of the 40 L. monocytogenes isolates inferred by ClonalFrame based on the virulence cluster sequence data. The tree represents a 95 % consensus between two independent runs of the program with the same initial parameters. In order to construct the tree, ClonalFrame takes into account the possibility of recombination. Internal branches where recombination events were identified are marked with letters (see Table 4 for details regarding the recombination events).
