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Table III.
Changes in the mean values (†SD) of acid production and E. coli O157:H7 counts in pasteurized and LP-activated Saanen goat milk fermented by single strain LAB at 30 °C.
LAB strains | Time (h) | Titratable acidity (%) |
LAB (log cfu·mL−1) |
E. coli O157:H7 (log cfu·mL−1) |
|||
---|---|---|---|---|---|---|---|
No LP | LP | No LP | LP | No LP | LP | ||
Lc. diacetylactis 340 | 2 | 0.24 (†0.009) | 0.25 (0.032) | 8.41 (0.017) | 8.43 (0.134) | 6.56 (0.031) | 6.69 (0.076) |
6 | 0.66 (0.012) | 0.66 (0.009) | 9.27 (0.004) | 9.21 (0.126) | 7.31 (0.25) | 7.34 (0.063) | |
24 | 0.70 (0.015) | 0.82 (0.028) | 8.95 (0.123) | 9.01 (0.068) | 5.97 (0.229) | 5.94 (0.197) | |
Lc. lactis 345 | 2 | 0.22 (0.015) | 0.26 (0.022) | 8.71 (0.035) | 8.47 (0.047) | 6.68 (0.015) | 6.54 (0.095) |
6 | 0.66 (0.032) | 0.66 (0.017) | 9.09 (0.082) | 9.21 (0.029) | 6.93 (0.135) | 7.12 (0.052) | |
24 | 0.82 (0.015) | 0.81 (0.009) | 8.91 (0.166) | 8.83 (0.016) | 6.02 (0.170) | 5.84 (0.216) | |
Lc. cremoris 326 | 2 | 0.25 (0.009) | 0.22 (0.009) | 8.50 (0.070) | 8.43 (0.016) | 6.72 (0.195) | 6.89 (0.020) |
6 | 0.64 (0.025) | 0.66 (0.019) | 9.11 (0.016) | 9.13 (0.013) | 6.85 (0.090) | 7.07 (0.073) | |
24 | 0.81 (0.015) | 0.81 (0.009) | 9.22 (0.310) | 8.92 (0.134) | 6.17 (0.371) | 5.42 (0.074) | |
B. longum BB536 | 2 | 0.23 (0.009) | 0.21 (0.009) | 8.83 (0.097) | 8.77 (0.054) | 6.88 (0.054) | 7.05 (0.121) |
6 | 0.70 (0.012) | 0.67 (0.006) | 9.31 (0.026) | 9.24 (0.023) | 7.07 (0.197) | 6.98 (0.041) | |
24 | 0.84 (0.10) | 0.81 (0.012) | 9.25 (0.111) | 9.13 (0.087) | 5.41 (0.117) | 5.19 (0.147) | |
Lc. lactis AM1 | 2 | 0.29 (0.032) | 0.28 (0.032) | 8.93 (0.028) | 8.86 (0.027) | 6.70 (0.103) | 6.76 (0.107) |
6 | 0.70 (0.013) | 0.69 (0.015) | 9.28 (0.018) | 9.26 (0.020) | 6.96 (0.204) | 7.03 (0.066) | |
24 | 0.83 (0.015) | 0.80 (0.009) | 9.00 (0.153) | 9.21 (0.050) | 5.65 (0.164) | 5.32 (0.283) | |
P (LAB strain effect) | 0.000 | 0.000 | 0.151 | ||||
P (LP effect) | 0.745 | 0.822 | 0.635 | ||||
P (time) | 0.000 | 0.000 | 0.000 | ||||
P (LP vs. time) | 0.959 | 0.735 | 0.012 | ||||
P (LAB vs. E. coli O157:H7) | 0.000 | 0.000 | NA | ||||
P (LP vs. LAB vs. E. coli O157:H7) | 0.954 | 0.960 | NA | ||||
N | 3 |