FIG 4.

Correlations between inactivation by high-pressure processing (HPP) (600 MPa for 3 min) and exposure to 50 mM citric acid (pH 2.2) for 2 h (A), desiccation (B), heat (60°C for 5 min) (C), or nutrient deprivation (D) for pressure-tolerant (open symbols) and pressure-sensitive (closed symbols) S. enterica strains. Triangles, S. enterica serovar Infantis; squares, S. enterica serovar Montevideo; circles, S. enterica serovar Muenchen; horizontal bars, S. enterica serovar Thompson; diamonds, S. enterica serovar Typhimurium. a, significant difference between the two groups of bacteria (P < 0.05).