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B
ird
et al
.:
J
ournal of
aoaC i
nternational
V
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99, n
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4, 2016
985
Table 2016.01C.
Comparative results for the detection of
Salmonella
at three inoculum levels in raw ground beef (73% lean)
by the 3M MDA 2 –
Salmonella
method versus USDA/FSIS MLG reference method in a collaborative study
Statistic
Matrix and
inoculation level Laboratory
Candidate
presumptive
Candidate
confirmed
Candidate
result
Reference
method
Candidate versus
reference
N X
POD
CP
N X
POD
CC
N X
POD
C
N X
POD
R
dLPOD
C
dLPOD
CP
Raw ground
beef (73%
lean),
uninoculated
control
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 2 0.17 12
2
0.17 12 2 0.17 12 1 0.08 0.09 0.00
4
12 2 0.17 NA
a
0
0.00 NA 0 0
.00 12 0 0.00 0.00 0.175
b
NA NA NA NA NA NA NA NA NA NA NA NA NA NA
6
12 0 0.00 12
0
0
.00 12 0 0.00 12 0 0.00 0.00 0.00
7
c
NA NA NA NA NA NA NA NA NA NA NA NA NA NA
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
c
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 0.00 0.00 0.00
12
12 0 0.00 12
0
0
.00 12 0 0.00 12 1 0.08 −0.08 0.00
13
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
16
12 0 0.00 12
1
0.08 12 0 0
.00 12 0 0.00 0.00 −0.08Estimate
All
156 4 0.03 156 3
0.02 156 2 0.01 156 2 0.01 0.00 0.01
LCL
d
0.01
0.01
0.00
0.00 −0.03 −0.03
UCL
e
0.06
0.06
0.05
0.05 0.03 0.05
s
r
0.15
0.14
0.11
0.11
LCL
0.14
0.12
0.10
0.10
UCL
0.17
0.15
0.15
0.15
s
L
0.04
0.03
0.03
0.00
LCL
0.00
0.00
0.01
0.00
UCL
0.09
0.07
0.07
0.04
s
R
0.16
0.14
0.11
0.11
UCL
0.14
0.12
0.10
0.10
LCL
0.19
0.15
0.13
0.13
P
T
0.0315
0.0877
0.0184
0.5167
Raw ground
beef (73%
lean), low
inoculum level
1
12 6 0.50 12
6
0.50 12 6 0.50 12 7 0.58 −0.08 0.00
2
12 5 0.42 12
5
0.42 12 5 0.42 12 4 0.33 0.09 0.00
3
12 9 0.75 12 10 0.83 12 9 0.75 12 7 0.58 0.17 −0.08
4
12 5 0.42 NA 4
0.33 NA 4 0.33 12 3 0.25 0.08 0.08
5
b
NA NA NA NA NA NA NA NA NA NA NA NA NA NA
6
12 6 0.50 12
6
0.50 12 6 0.50 12 7 0.58 −0.08 0.00
7
c
NA NA NA NA NA NA NA NA NA NA NA NA NA NA
8
12 9 0.75 12
9
0.75 12 9 0.75 12 8 0.66 0.09 0.00
9
12 4 0.33 12
4
0.33 12 4 0.33 12 5 0.42 −0.08 0.00
10
c
NA NA NA NA NA NA NA NA NA NA NA NA NA NA
11
12 6 0.50 12
6
0.50 12 6 0.50 12 3 0.25 0.25 0.00
12
12 8 0.66 12
8
0.66 12 8 0.66 12 7 0.58 0.08 0.00
13
12 8 0.66 12
8
0.66 12 8 0.66 12 8 0.66 0.00 0.00
14
12 3 0.25 12
3
0.25 12 3 0.25 12 6 0.50 −0.25 0.00
15
12 5 0.42 12
5
0.42 12 5 0.42 12 4 0.33 0.09 0.00
16
12 9 0.75 12
9
0.75 12 9 0.75 12 8 0.33 0.09 0.00