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Table 2013.2B (cont’d)
: Comparative Results for the Detection of
Listeria
spp. inQueso Fresco (25 g) by the VIDAS LPTMethod with Confirmation on
1
ALOAvs. AOAC 993.12 in a Collaborative Study (High Level)
2
Statistic
MPN/
Test Portion Laboratory
Candidate
presumptive (CP)
Candidate confirmed
(CC)
Candidate result (C)
Reference method
(R)
C vs. R
N
X
POD(CP)
N
X
POD(CC)
N
X
POD(C) N
X POD(R) dLPOD
(C,R)
dLPOD
(CP,CC)
5.48
3.60
8.36
1
12
12
1.00
12
12
1.00
12
12
1.00
12
12
1.00
0.00
0.00
2
12
12
1.00
12
12
1.00
12
12
1.00
12
12
1.00
0.00
0.00
3
12
12
1.00
12
12
1.00
12
12
1.00
12
12
1.00
0.00
0.00
4
12
12
1.00
12
12
1.00
12
12
1.00
12
12
1.00
0.00
0.00
5
12
12
1.00
12
12
1.00
12
12
1.00
12
12
1.00
0.00
0.00
6
12
12
1.00
12
12
1.00
12
12
1.00
12
12
1.00
0.00
0.00
7
12
12
1.00
12
12
1.00
12
12
1.00
12
12
1.00
0.00
0.00
8
12
12
1.00
12
12
1.00
12
12
1.00
12
12
1.00
0.00
0.00
9
12
12
1.00
12
12
1.00
12
12
1.00
12
12
1.00
0.00
0.00
10
12
12
1.00
12
12
1.00
12
12
1.00
12
12
1.00
0.00
0.00
11
a
12
12
1.00
12
12
1.00
12
12
1.00
12
12
1.00
0.00
0.00
12
12
12
1.00
12
12
1.00
12
12
1.00
12
12
1.00
0.00
0.00
13
12
12
1.00
12
12
1.00
12
12
1.00
12
12
1.00
0.00
0.00
14
12
12
1.00
12
12
1.00
12
12
1.00
12
12
1.00
0.00
0.00
Estimate
All
156 156
1.00
156 156
1.00
156 156
1.00
156 156
1.00
0.00
0.00
LCL
0.98
0.98
0.98
0.98
-0.02
-0.02
UCL
1.00
1.00
1.00
1.00
0.02
0.02
s
r
b
0.00
0.00
0.00
0.00
LCL
0.00
0.00
0.00
0.00
UCL
0.15
0.15
0.15
0.15
s
L
c
0.00
0.00
0.00
0.00
LCL
0.00
0.00
0.00
0.00
UCL
0.15
0.15
0.15
0.15
s
R
d
0.00
0.00
0.00
0.00
UCL
0.00
0.00
0.00
0.00
LCL
0.21
0.21
0.21
0.21
P
T
e
1.0000
1.0000
1.0000
1.0000
a
Results were not used in statistical analysis due to laboratory error.
3
c
Repeatability Standard Deviation,
d
Among-Laboratory Standard Deviation,
e
Reproducibility Standard Deviation,
f
P Value =Homogeneity test of laboratory PODs
4
LCL – Lower Confidence Limit; UCL – Upper Confidence Limit
5
6
26