346-347 / 1195
Revised Mar 2014
29
Table 2013.2A (cont’d.)
: Comparative Results for the Detection of
Salmonella
spp. in Raw Ground Beef (25 g) by the 3M MDA
Salmonella
Method vs.
1
USDA/MLG-FSIS in an Inter-laboratory Study (Low-Level Inoculum)
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
7
0.58
12
7
0.58
12
7
0.58
12
5
0.42
0.16
0.00
2
12
6
0.50
12
6
0.50
12
6
0.50
12
9
0.75
-0.25
0.00
3
b
NA
i
NA
NA
NA NA
NA
NA NA
NA
NA NA
NA
NA
NA
4
b
NA NA
NA
NA NA
NA
NA NA
NA
NA NA
NA
NA
NA
5
b
NA NA
NA
NA NA
NA
NA NA
NA
NA NA
NA
NA
NA
6
b
NA NA
NA
NA NA
NA
NA NA
NA
NA NA
NA
NA
NA
7
b
NA NA
NA
NA NA
NA
NA NA
NA
NA NA
NA
NA
NA
8
b
NA NA
NA
NA NA
NA
NA NA
NA
NA NA
NA
NA
NA
9
12
9
0.75
12
7
0.58
12
7
0.58
12
8
0.67
-0.09
0.17
10
12
7
0.58
12
7
0.58
12
7
0.58
12
6
0.50
0.08
0.00
11
12
6
0.50
12
6
0.50
12
6
0.50
12
7
0.58
-0.08
0.00
12
a
12
10
0.83
12
6
0.50
12
6
0.50
12
9
0.75
-0.25
0.33
13
12
7
0.58
12
7
0.58
12
7
0.58
12
6
0.50
0.08
0.00
14
12
7
0.58
12
7
0.58
12
7
0.58
12
8
0.67
-0.09
0.00
15
12
7
0.58
12
7
0.58
12
7
0.58
12
8
0.67
-0.09
0.00
16
a
12
9
0.75
12
8
0.66
12
8
0.66
12
3
0.25
0.41
0.09
17
12
5
0.42
12
5
0.42
12
5
0.42
12
6
0.50
-0.08
0.00
18
a
12
12
1.00
12
8
0.67
12
8
0.67
12
8
0.67
0.00
0.33
19
a
12
5
0.42
12
4
0.33
12
4
0.33
12
7
0.58
-0.25
0.09
20
12
8
0.67
12
8
0.67
12
8
0.67
12
5
0.42
0.25
0.00
Estimate
All
120 69
0.58
120 67
0.56
120 67
0.56
120 68
0.57
-0.01
0.02
LCL
c
0.48
0.47
0.47
0.48
-0.14
-0.11
UCL
d
0.67
0.65
0.65
0.66
0.12
0.15
s
r
e
0.51
0.51
0.51
0.50
LCL
0.45
0.45
0.45
0.45