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Mean D-values in h (for acid, heat, and oxidative stress) or days (cold, osmotic, freeze-thaw, and starvation stress) for each Escherichia coli O157:H7 genotype. (A) Lineage-specific polymorphisms; (B) antiterminator Q gene allele; (C) Shiga toxin 2 subtype; (D) Shiga-toxin-encoding bacteriophage insertion sites; (E) tir (A255T) polymorphisms; (F) clade typing.
