TABLE 1

Growth parameters of E. coli O157:H7 growing in TSB containing 1.6% (vol/vol) ethanol or 0.16 mg/ml thymol, carvacrol, or trans-cinnamaldehyde

TreatmentaGrowth parameterb
Initial cell density (log CFU/ml)Lag phase duration (h)Maximum growth rate (h−1)Final cell density (log CFU/ml)
Control5.2 ± 0.3 AB1.4 ± 0.4 A1.0 ± 0.1 A9.4 ± 0.1 A
1/2T4.9 ± 0.2 A6.0 ± 0.4 B0.7 ± 0.1 B8.5 ± 0.2 B
1/2C5.0 ± 0.2 A6.9 ± 0.9 B0.7 ± 0.1 B8.6 ± 0.3 B
1/2TC5.5 ± 0.2 B8.5 ± 1.1 C0.7 ± 0.1 B9.3 ± 0.1 A
  • a Control, ethanol; 1/2T, 0.16 mg/ml thymol; 1/2C, 0.16 mg/ml carvacrol; 1/2TC, 0.16 mg/ml trans-cinnamaldehyde.

  • b Different uppercase letters in the same column represent statistically significant differences (P < 0.05) between control and adapted cells.