920-921 / 1195
15
1
2
3
Table 5. Ruggedness - Sample boiling time
4
5
Trial 1
Trial 2
Strains
Test
Sample boiling time (min.)
Sample boiling time (min.)
4
5
6
4
5
6
Listeria monocytogenes
ATCC 19115
1
1.15
1.19
1.14
1.03
1.00
0.91
2
1.10
1.13
1.23
0.99
0.97
0.95
3
1.17
1.14
1.09
1.08
0.96
0.98
4
1.14
1.14
0.86
1.09
0.94
0.96
5
1.17
1.14
1.13
1.08
0.96
0.96
Mean
1.15
1.15
1.09
1.05
0.97
0.95
Listeria monocytogenes
ATCC 19117
1
1.02
0.99
0.89
0.78
0.76
0.75
2
1.04
0.96
0.85
0.83
0.79
0.72
3
1.03
0.93
0.91
0.84
0.79
0.73
4
1.04
0.94
0.98
0.81
0.76
0.74
5
0.97
0.97
0.90
0.83
0.76
0.70
Mean
1.02
0.96
0.91
0.82
0.77
0.73
Bacillus cereus
ATCC 27522
1
0.00
0.00
0.00
0.00
0.00
0.00
2
0.00
0.00
0.00
0.00
0.00
0.00
3
0.00
0.00
0.00
0.00
0.00
0.00
4
0.00
0.00
0.00
0.00
0.00
0.00
5
0.00
0.00
0.00
0.00
0.00
0.00
Mean
0.00
0.00
0.00
0.00
0.00
0.00
Positive results = TV
≥
0.05, negative results = TV< 0.05
6
ATCC = American Type Culture Collection
7
8
9
PTM Certification Report