Survival kinetics of Salmonella enterica serotype senftenberg (S. senftenberg) after heat and acid stress

The survival kinetics of two clinical isolates of Salmonella senftenberg were studied after heat and acid stress. The strains survived better at 53 and 55 °C after heat shock of 30 min at 50 °C or overnight heat adaptation at 45 °C. An increase in the decimal reduction time, D, of heat-shocked [10.2 min (53 °C) and 9.37 min (55 °C)] and heat-adapted [8.12 min (53 °C) and 7.8 min (55 °C)] cells was observed compared with the non-stressed cells [6.87 min (53 °C), 6.56 min 55 °C)]. A significant difference was also observed in the survival of acid-adapted to acid non-adapted S. senftenberg bacteria.