Bacteria Temperature (°C) 300 MPa 350 MPa 400 MPa
Salmonella spp. Control
25
35
45
50
55
60
7.7 ± 0.26
4.3 ± 0.14
2.1 ± 0.12
1.0 ± 0.12
ND
ND*
ND
7.7 ± 0.26
3.4 ± 0.16
1.6 ± 0.12
ND
ND
ND*
ND
7.7 ± 0.26
2.0 ± 0.12
0.8 ± 0.10
ND
ND
ND*
ND
E. coli O157:H7 Control
25
35
45
50
55
60
7.8 ± 0.26
5.6 ± 0.14
3.0 ± 0.12
1.4 ± 0.12
ND
ND*
ND
7.8 ± 0.26
4.2 ± 0.16
2.1 ± 0.12
ND
ND
ND*
ND
7.7 ± 0.26
2.4 ± 0.12
1.2 ± 0.12
ND
ND
ND*
ND
aValues represent mean ± SD of three experiments with duplicate determinations. ND* = no colony forming unit (CFU) determined on the agar plates. Survivors (Log10 CFU/ml)a
Table 1: Survival of Salmonella spp. and E. coli O157:H7 in apple juice treated with high hydrostatic pressure for 25 min.