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Survival of log-phase-grown STEC O157:H7 ATCC 43895 in chemically defined apple juice at different pHs and different concentrations of caffeic acid after 24 h of incubation at 25°C. Numbers below 1.4 log10 CFU/ml indicate that the viable counts were below the level of detection. Error bars represent 95% confidence intervals. The initial level was 5.7 log10 CFU/ml.
