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PCA of isolates in the training set. (a) Colored at genus level: beige = Shigella, teal = Escherichia; (b) Colored at pathotype level: black = Shigella/EIEC, green = E. coli (other than EIEC); (c) Colored at group level: orange = Shigella spp., yellow = EIEC, purple = E. coli (other than EIEC); (d) Colored at species level: light blue = S. dysenteriae, red = S. flexneri, green = S. boydii, pink = S. sonnei, blue = EIEC, light grey = Other E. coli.
