FIG. 6.

Effect of desiccation on thermal tolerance of S. Typhimurium. Desiccated, nondesiccated, and rehydrated cells were exposed to temperatures of 60, 80, and 100°C for 1 h (A) or to 100°C for up to 60 min (B). The average numbers of surviving cells (+ standard deviations) from three independent experiments are presented. For each temperature, means followed by different letters indicate a significant difference between desiccated and nondesiccated cells (P < 0.01). Asterisks, Salmonella counts below the detection limit (<10 CFU).