Table 2.

Inactivation of E. coli O157:H7, S. enteritidis, and L. monocytogenes by EO water at 35°C

Bacterial speciesSurviving bacterial population (mean log CFU/ml) after exposure for:EO water property
0 min2 min4 min6 minpHORP (mV)Free chlorine (ppm)
E. coliO157:H77.97 ± 0.03 0b 0b 0b
2.38 ± 0.001,154 ± 184.3 ± 4.6
Control7.97 ± 0.037.94 ± 0.047.96 ± 0.037.94 ± 0.04
S. enteritidis 7.68 ± 0.14<1.0a 0b 0b
2.44 ± 0.041,153 ± 179.8 ± 3.3
Control7.68 ± 0.147.63 ± 0.067.59 ± 0.117.64 ± 0.11
L. monocytogenes 7.91 ± 0.10 0b 0b 0b
2.48 ± 0.051,159 ± 473.3 ± 1.8
Control7.91 ± 0.107.88 ± 0.117.86 ± 0.087.81 ± 0.12
  • a Positive by enrichment.

  • b Negative by enrichment and no detectable survivors by a direct plating procedure.