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Dendrogram showing the relatedness between virulence gene profiles (V-profile) for 30 exotoxin genes, 3 island markers, and the agr group of the ST398 and outgroup S. aureus isolates tested. The number of isolates is shown in parentheses when n > 1. Clusters are described in the text. The scale shows genetic similarity using Jaccard's coefficient (J). Dashed lines separate clusters/subclusters grouping ST398 isolates.
