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Table IV.

Changes in the mean values (†SD) of pH, titratable acidity and counts of E. coli O157:H7 and indigenous LAB during processing of traditional Madila at 30 °C.

LP treatment Time (days) E. coli O157:H7 (log cfu·mL−1) Lactococcus (log cfu·mL−1) Lactobacillus and Leuconostoc (log cfu·mL−1) pH Titratable acidity (%)
No LP 0 6.95 (†0.08) 6.68 (0.19) 7.30 (0.19) 6.35 (0.08) 0.17 (0.01)
1 7.23 (0.73) 9.13 (0.16) 9.28 (0.04) 4.19 (0.08) 0.75 (0.00)
2 4.39 (0.79) 8.55 (0.16) 8.77 (0.40) 4.19 (0.12) 0.77 (0.03)
3 3.43 (0.33) 8.51 (0.16) 8.90 (0.22) 4.36 (0.04) 0.73 (0.01)
4 3.89 (0.15) 8.44 (0.10) 8.84 (0.23) 4.09 (0.04) 0.96 (0.04)
5 4.25 (1.15) 7.35 (0.59) 7.30 (0.52) 3.92 (0.05) 1.17 (0.05)
LP 0 6.95 (0.07) 6.67 (0.11) 7.21 (0.12) 6.44 (0.02) 0.16 (0.01)
1 7.27 (0.75) 9.03 (0.13) 9.13 (0.15) 4.22 (0.08) 0.77 (0.05)
2 4.85 (0.38) 8.49 (0.18) 8.45 (0.17) 4.11 (0.04) 0.73 (0.03)
3 3.75 (0.19) 8.28 (0.17) 8.61 (0.19) 4.33 (0.12) 0.71 (0.05)
4 2.76 (0.22) 8.33 (0.17) 8.40 (0.24) 3.97 (0.10) 1.09 (0.08)
5 0.52 (0.52) 7.44 (0.42) 7.48 (0.37) 3.79 (0.08) 1.35 (0.03)
P (LP) 0.052 0.636 0.243 0.382 0.062
P (LP vs. time) 0.010 0.993 0.884 0.625 0.043
N 3