372-373 / 596
28
Table 2016.2B (cont’d.)
: Comparative Results for the Detection of
Listeria
in 25 g Raw Chicken Breast Fillet Test Portions by the 3M
™
MDA 2 -
Listeria
1
Method vs. USDA/FSIS MLG Chapter. 8.09 in a Collaborative Study (High Inoculum Level)
2
Statistic
Matrix/
Inoculation
Level
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)
Raw
Chicken
Breast
Fillet
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
11
0.92
12
12
1.00
12
11
0.92
12
12
1.00
-0.08
-0.08
10
b
12
12
1.00
12
12
1.00
12
12
1.00
12
12
1.00
0.00
0.00
MPN/
Test
Portion
6.24
3.58
10.88
11
a
NA NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
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
Estimate
All
132 131
0.99
132 132
1.00
132
131
0.99
132 132
1.00
-0.01
-0.01
LCL
0.96
0.97
0.96
0.97
-0.04
-0.04
UCL
1.00
1.00
1.00
1.00
0.02
0.02
s
r
c
0.09
0.00
0.09
0.00
LCL
0.08
0.00
0.08
0.00
UCL
0.16
0.16
0.16
0.16
s
L
d
0.00
0.00
0.00
0.00
LCL
0.00
0.00
0.00
0.00
UCL
0.04
0.16
0.04
0.16
s
R
e
0.09
0.00
0.09
0.00
UCL
0.08
0.00
0.08
0.00
LCL
0.10
0.23
0.10
0.23
P
T
f
0.4338
1.0000
0.4338
1.0000
a
N/A – Laboratory did not participate or submit data for this matrix;
b
Results were not used in statistical analysis due to deviation from testing protocol.
3
c
Repeatability Standard Deviation,
d
Among-Laboratory Standard Deviation,
e
Reproducibility Standard Deviation,
f
P
T
Value = Homogeneity test of laboratory PODs
4
LCL – Lower Confidence Limit; UCL – Upper Confidence Limit
, N = number of samples tested, X = number of test samples with a positive result (presumptive or confirmed)
5
6
7