Figure 3. Enzymatic activities of Escherichia coli O157:H7 measured by the API ZYM system.

(A) the exponential-phase cells; (B) VBNC cells treated by HPCD at 5 MPa and 25°C for 40 min; (C) VBNC cells treated by HPCD at 5 MPa and 31°C for 30 min; (D) VBNC cells treated by HPCD at 5 MPa and 34°C for 28 min; (E) VBNC cells treated by HPCD at 5 MPa and 37°C for 25 min.