Table 2.

Sensitivity of stationary-phase E. colistrains to lactate and ethanol at low pHs

StrainTime (min)% Survivala at pH 3 with:
No additionsLactate (50 mM)Ethanol (5%)Lactate (50 mM) and ethanol (5%)
30-2C4510018658.5
10850.0752NS
15100NS22NS
C94905800.03300.01
1087NS1.5NS
1522NS0.02NS
12675902.0650.09
10700.03380.01
15540.119.0NS
J151001.539NS
10700.0111NS
15450.029.0NS
  • a Expressed as a percentage of CFU per milliliter of inoculum. Data are averages from at least two independent experiments and routinely varied by less than 10%. NS, no survivors detected. The minimum level of detection was 20 CFU · ml−1.