TABLE 1.

Estimated δ and p values for S. Typhimurium CECT 443 heat-, acid-, alkaline-, and oxidative stress-treated cellsa

Treatment conditionδ (min)p
Heat (55°C)0.59 ± 0.200.43 ± 0.05
Acid (pH 2.5)6.72 ± 0.910.88 ± 0.08
Alkaline (pH 11.0)5.18 ± 0.730.86 ± 0.07
Oxidation (H2O2 at 40 mM)11.05 ± 1.061.06 ± 0.11
  • a δ and p values were estimated from the fit of the mathematical model log Nt/N0 = −(t/δ)p to experimental data of S. Typhimurium CECT 443 heat (55°C)-, acid (pH 2.5)-, alkaline (pH 11.0)-, and oxidative stress (H2O2 at 40 mM)-treated cells.