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5 groups were observed, with all Marseille isolates clustering in group 5. Closer look at group 5 shows that the most Marseille isolates are genetically related, including all strains from the 2000 and 2005 epidemics. #553 (diamond) differs genetically from #497 (circle) and prototype Giles (square) by 0.157 and 0.312 respectively.
