158-159 / 471
Table 2014.2A
: Comparative Results for the Detection of
Listeria
in Full Fat Cottage Cheese (4% Milk Fat) by the 3M
™
MDA
Listeria
Method vs. AOAC OMA
1
993.12 in a Collaborative Study (Un-inoculated Control)
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)
1
12
0
0.00
12
0
0.00
12
0
0.00
12
0
0.00
0.00
0.00
2
12
0
0.00
12
0
0.00
12
0
0.00
12
0
0.00
0.00
0.00
3
12
0
0.00
12
0
0.00
12
0
0.00
12
0
0.00
0.00
0.00
4
a
NA NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
5
a
NA NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
6
a
12
1
0.08
12
12
1.00
12
1
0.08
12
0
0.00
0.08
1.00
7
12
0
0.00
12
0
0.00
12
0
0.00
12
0
0.00
0.00
0.00
8
12
0
0.00
12
0
0.00
12
0
0.00
12
0
0.00
0.00
0.00
9
12
0
0.00
12
0
0.00
12
0
0.00
12
0
0.00
0.00
0.00
10
12
0
0.00
12
0
0.00
12
0
0.00
12
0
0.00
0.00
0.00
11
12
1
0.08
12
0
0.00
12
0
0.00
12
0
0.00
0.08
0.00
12
12
0
0.00
12
0
0.00
12
0
0.00
12
0
0.00
0.00
0.00
13
a
12
0
0.00
12
0
0.00
12
0
0.00
12
0
0.00
0.00
0.00
14
12
0
0.00
12
0
0.00
12
0
0.00
12
0
0.00
0.00
0.00
15
12
0
0.00
12
0
0.00
12
0
0.00
12
0
0.00
0.00
0.00
Estimate
All
132
1
0.01
132
0
0.00
132
0
0.00
132
0
0.00
0.00
0.01
LCL
0.00
0.00
0.00
0.00
-0.03
-0.02
UCL
0.04
0.03
0.03
0.03
0.03
0.04
s
r
b
0.09
0.00
0.00
0.00
LCL
0.08
0.00
0.00
0.00
UCL
0.16
0.16
0.16
0.16
s
L
c
0.00
0.00
0.00
0.00
LCL
0.00
0.00
0.00
0.00
UCL
0.04
0.16
0.16
0.16
s
R
d
0.09
0.00
0.00
0.00
UCL
0.08
0.00
0.00
0.00
LCL
0.10
0.23
0.23
0.23
P
T
e
0.4338
1.0000
1.0000
1.0000
a
Results were not used in statistical analysis due to deviation from testing protocol.
3
b
Repeatability Standard Deviation,
c
Among-Laboratory Standard Deviation,
d
Reproducibility Standard Deviation,
e
P
T
Value =Homogeneity test of laboratory PODs
4
LCL – Lower Confidence Limit; UCL – Upper Confidence Limit;
NA- laboratory results were not received
5
6
7
Candidates for 2016 Method of the Year
130