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Document 2 of 2 – 3M Petrifilm Salmonella Express PTM Study Report
Table 27. 3M Petrifilm SALX Method Comparison POD Results for Cooked Chicken Nuggets (Internal Data)
1
X
c
POD
C
d
95% CI
x
POD
R
e
95% CI
Salmonella
0
5
0
0
0.00 - 0.43
0
0
0.00 - 0.43
0 -0.43 – 0.43
Typhimurium
0.03 (0.01-
0.08)
20
6
0.3 0.15 – 0.52
6
0.3 0.15 – 0.52
0 -0.27 – 0.27
ATCC
0
5
0
0
0.00 - 0.43
0
0
0.00 - 0.43
0 -0.43 – 0.43
14028
0.03 (0.01-
0.08)
20
6
0.3 0.15 – 0.52
6
0.3 0.15 – 0.52
0 -0.27 – 0.27
Reference Method
dPOD
C
f
95% CI
g
Cooked Chicken
Nuggets Vs.
USDA/FSIS-
MLG
18 Hr
Primary
Enrichment
24 Hr
Primary
Enrichment
Matrix
Time Point
Strain MPN
a
/325g
N
b
3M Petrifilm SALX Method
g
95% CI = If the confidence interval of a dPOD does not contain zero, then the difference is statistically significant at the 5% level
a
MPN = Most Probable Number is based on the POD of reference method test portions across labs using the AOAC MPN calculator with 95% confidence interval
b
N = Number of test potions
c
x = Number of positive test portions
d
POD
C
=
Candidate method confirmed positive outcomes divided by the total number of trials
e
POD
R
= Reference method confirmed positive outcomes divided by the total number of trials
f
dPOD
C
= Difference between the candidate method confirmed results and candidate method confirmed result POD values
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17