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B
ird
et al
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J
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AOAC I
nternational
V
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100, N
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2, 2017
459
Table 2016.08C. Comparative results for the detection of
L. monocytogenes
at three inoculum levels in 125 g deli turkey test
portions by the 3M MDA 2 –
L. monocytogenes
method vs the USDA/FSIS MLG reference method in a collaborative study
Statistic Matrix Laboratory
Candidate
presumptive
Candidate
confirmed
Candidate
result
Reference
method
Candidate vs.
reference
Presumptive
vs. confirmed
n
a
x
b
POD
CP
n x
POD
CC
n
x
POD
C
n x
POD
R
dLPOD
C
dLPOD
CP
Uninoculated control
Deli turkey
1
12 0 0.00 12 0
0
.00 12 0 0.00 12 0 0.000.00
0.00
2
12 0 0.00 12 0
0
.00 12 0 0.00 12 0 0.000.00
0.00
3
12 0 0.00 12 0
0
.00 12 0 0.00 12 0 0.000.00
0.00
4
12 0 0.00 12 0
0
.00 12 0 0.00 12 0 0.000.00
0.00
5
12 0 0.00 12 0
0
.00 12 0 0.00 12 0 0.000.00
0.00
6
12 0 0.00 12 0
0
.00 12 0 0.00 12 0 0.000.00
0.00
7
12 0 0.00 12 0
0
.00 12 0 0.00 12 0 0.000.00
0.00
8
NA
c
NA NA NA NA NA NA NA NA NA NA NA
NA
NA
9
12 0 0.00 12 0
0
.00 12 0 0.00 12 0 0.000.00
0.00
10 NA NA NA NA NA NA NA NA NA NA NA NA
NA
NA
11
12 0 0.00 12 0
0
.00 12 0 0.00 12 0 0.000.00
0.00
12
12 0 0.00 12 0
0
.00 12 0 0.00 12 0 0.000.00
0.00
13
12 0 0.00 12 0
0
.00 12 0 0.00 12 0 0.000.00
0.00
Estimate
All
132 0 0.00 132 0
0
.00 132 0 0.00 132 0 0.00
0.00
0.00
LCL
d
0.00
0.00
0.00
0.00
−0.03
−0.03
UCL
e
0.03
0.03
0.03
0.03
0.03
0.03
s
r
0.00
0.00
0.00
0.00
LCL
0.00
0.00
0.00
0.00
UCL
0.16
0.16
0.16
0.16
s
L
0.00
0.00
0.00
0.00
LCL
0.00
0.00
0.00
0.00
UCL
0.16
0.16
0.16
0.16
s
R
0.00
0.00
0.00
0.00
UCL
0.00
0.00
0.00
0.00
LCL
0.23
0.23
0.23
0.23
P
T
1.0000
1.0000
1.0000
1.0000
Low inoculum level
Deli turkey
1
12 7 0.58 12 7
0.58 12 7 0.58 12 6 0.50
0.08
0.00
2
12 7 0.58 12 6
0.50 12 6 0.50 12 5 0.42
0.08
0.08
3
12 4 0.33 12 4
0.33 12 4 0.33 12 5 0.42
−0.08
0.00
4
12 5 0.42 12 5
0.42 12 5 0.42 12 4 0.33
0.08
0.00
5
12 6 0.50 12 6
0.50 12 6 0.50 12 6 0.50
0.00
0.00
6
12 8 0.66 12 7
0.58 12 7 0.58 12 6 0.50
0.08
0.00
7
12 7 0.58 12 7
0.58 12 7 0.58 12 6 0.50
0.08
0.00
8
NA NA NA NA NA NA NA NA NA NA NA NA
NA
NA
9
12 8 0.66 12 8
0.66 12 8 0.66 12 6 0.50
0.16
0.00
10 NA NA NA NA NA NA NA NA NA NA NA NA
NA
NA
11
12 7 0.58 12 6
0.50 12 6 0.50 12 7 0.58
−0.08
0.08
12
12 5 0.42 12 5
0.42 12 5 0.42 12 4 0.33
0.08
0.00
13
12 5 0.42 12 5
0.42 12 5 0.42 12 5 0.42
0.00
0.00
MPN,
CFU/test
portion
Estimate 0.63
All
132 69 0.52 132 66 0.50 132 66 0.50 132 60 0.45
0.04
0.02
LCL
0.49
0.43
0.41
0.41
0.37
−0.08
−0.10
UCL
0.80
0.61
0.59
0.59
0.54
0.17
0.15