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The survival of stationary-phase (A and C) or log-phase (B and D) STEC O157:H7 ATCC 43895 in chemically defined apple juice (pH 3.7) at 25°C (A and B) or 4°C (C and D) in the presence of caffeic acid at concentrations of 0 (open diamonds), 0.2 (solid squares), 0.4 (solid triangles), or 1.0 (open circles) g/liter. Counts below 1.4 log10 CFU/ml indicate that STEC O157:H7 was not detected.
