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Surviving populations of non-acid-adapted or acid-adapted Salmonella Typhimurium suspended in PBS (A) or apple juice (C) or Escherichia coli O157:H7 suspended in PBS (B) or apple juice (D) and treated with a 222-nm KrCl excilamp. Each point and set of error bars represent the mean value for three replicates and the standard deviation, respectively.
