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Minimum Spanning Tree. This tree was generated with 15 MIRU-VNTR loci of the 123 strains from Jiangxi Province, China, using the MIRU-VNTRplus database (http://www.miru-vntrplus.org). CC1, CC2, CC3, and CC4 represent four major clonal complexes. The maximum locus difference within a clonal complex is five. The red circle denotes the Beijing family strain, while the blue circle denotes the non-Beijing family strain.
