TABLE 1.

Thermal and acid stress responses of S. enterica serovar Typhimurium cultured in the RWV with and without addition of a 3/32- or 1/8-in.-diameter polypropylene beada

ConditionMaximum shear (dynes/cm2)% Survival
Thermal stressAcid stress
No bead<0.017.5 ± 1.058.1 ± 2.5
3/32-in. bead5.24.9 ± 0.651.6 ± 1.5
1/8-in. bead7.82.9 ± 1.033.3 ± 4.2
  • a Cultures were removed from the RWV and immediately incubated at either 55°C for 30 min or at pH 3.5 for 30 min.