306 / 350
DRBC Raw
Count
Log
10
Petrifilm
2014-01 KA
Raw Count
Log
10
Petrifilm
2014-01 KB
Raw Count
Log
10
Petrifilm
2014-01 KC
Raw Count
Log
10
18
1.255
17
1.230
18
1.255
21
1.322
17
1.230
9
0.954
21
1.322
20
1.301
22
1.342
20
1.301
16
1.204
19
1.279
21
1.322
15
1.176
13
1.114
24
1.380
12
1.079
21
1.322
17
1.230
14
1.146
1.246
1.197
1.225
1.286
t-test 0.597
0.775
0.200
1
2
Table 7.
Summary of Combined Shelf Life and Lot-to-Lot Consistency for
Candida tropicalis
at the High
3
Inoculation Level.
4
DRBC Raw
Count
Log
10
Petrifilm 2014-
01 KA Raw
Count
Log
10
Petrifilm 2014-
01 KB
Raw Count
Log
10
Petrifilm
2014-01 KC
Raw Count
Log
10
88
1.944
114
2.057
92
1.964
90
1.954
105
2.021
102
2.009
91
1.959
104
2.017
87
1.940
91
1.959
99
1.996
101
2.004
95
1.978
95
1.978
92
1.964
115
2.061
75
1.875
92
1.964
94
1.973
97
1.987
1.952
1.993
1.971
2.005
t-test 0.170
0.520
0.073
5
6
Table 8.
Summary of Combined Shelf Life and Lot-to-Lot Consistency for
E. coli
at the High Inoculation
7
Level.
8
2014-01 KA 2014-01 KB 2014-01 KC
CFU/plate CFU/plate CFU/plate
1
142
0
0
0
0
2
127
0
0
0
0
3
139
0
0
0
0
4
120
0
0
0
0
5
142
0
0
0
0
Organism
Replicate Petrifilm AC
DRBC
Agar
E. coli
25922
High
Inoculation
Level
9
10
Summary of Combined Lot-to-Lot and Shelf Life Stability
11
A paired t-test for equal or unequal variances was conducted to analyze statistical differences between
12
Lot 2014-01 KA (time 0 shelf life), Lot 2014-01 KB (time 0 shelf life), Lot 2014-01 KC (time 0 month shelf
13
life). The p values obtained indicated that there were no significant differences in the results obtained
14
by the Petrifilm RYM Plate method for the detection of yeast or mold at the low or high level at any
15
lot/shelf life combination. The non-target organism,
E. coli
, was not detected one any of the plates at
16
10
AOAC Research Institute
Expert Review Panel Use Only
OMAMAN-16D/ PTM Report
ERP Use Only - December 2014