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Dendrogram generated from the Jaccard similarity coefficient computed for 14 serogroup 12 and 33 serogroup 1 (monoclonal subtype Bellingham) strains after pulsed-field gel electrophoresis of SfiI-restricted chromosomal DNAs. Strains from our patient are in boldface and are underlined. For strains that were isolated from the same source and were indistinguishable, one representative strain is shown.
