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The clusters of genotypes after K-means partitioning of the E. coli isolates represented in Table 5. Three clusters with distinct genetic markers are shown, where the challenge strains (group 1) are in a separate cluster from the generic E. coli (groups 2 and 3). Groups 2 and 3 highlight clustering among the genotypes for generic E. coli, with group 3 representing genotypes carrying select virulence markers (stx, eae, hly, and tir).
