AOAC ERP MICRO AUGUST 2018
B ird et al .: J ournal of AOAC I nternational V ol . 100, N o . 2, 2017 459
Table 2016.08C. Comparative results for the detection of L. monocytogenes at three inoculum levels in 125 g deli turkey test portions by the 3M MDA 2 – L. monocytogenes method vs the USDA/FSIS MLG reference method in a collaborative study
Candidate presumptive
Candidate confirmed
Candidate result
Reference method
Candidate vs. reference
Presumptive vs. confirmed
n a
x b
Statistic Matrix Laboratory
POD CP n x
POD CC
POD C n x
POD R
dLPOD C
dLPOD CP
n
x
Uninoculated control
Deli turkey
1 2 3 4 5 6 7 8 9
12 0 0.00 12 0 12 0 0.00 12 0 12 0 0.00 12 0 12 0 0.00 12 0 12 0 0.00 12 0 12 0 0.00 12 0 12 0 0.00 12 0
0.00 12 0 0.00 12 0 0.00 0.00 12 0 0.00 12 0 0.00 0.00 12 0 0.00 12 0 0.00 0.00 12 0 0.00 12 0 0.00 0.00 12 0 0.00 12 0 0.00 0.00 12 0 0.00 12 0 0.00 0.00 12 0 0.00 12 0 0.00
0.00 0.00 0.00 0.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00 0.00 0.00
NA c NA NA NA NA NA NA NA NA NA NA NA
NA
NA
12 0 0.00 12 0
0.00 12 0 0.00 12 0 0.00
0.00
0.00
10 NA NA NA NA NA NA NA NA NA NA NA NA
NA
NA
11 12 13 All
12 0 0.00 12 0 12 0 0.00 12 0 12 0 0.00 12 0 132 0 0.00 132 0
0.00 12 0 0.00 12 0 0.00 0.00 12 0 0.00 12 0 0.00 0.00 12 0 0.00 12 0 0.00 0.00 132 0 0.00 132 0 0.00
0.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00
Estimate LCL d UCL e
0.00 0.03 0.00 0.00 0.16 0.00 0.00 0.16 0.00 0.00 0.23
0.00 0.03 0.00 0.00 0.16 0.00 0.00 0.16 0.00 0.00 0.23
0.00 0.03 0.00 0.00 0.16 0.00 0.00 0.16 0.00 0.00 0.23
0.00 0.03 0.00 0.00 0.16 0.00 0.00 0.16 0.00 0.00 0.23
−0.03
−0.03
0.03
0.03
s r
LCL UCL
s L
LCL UCL
s R
UCL LCL
1.0000
1.0000
1.0000
1.0000
P T
Low inoculum level
Deli turkey
1 2 3 4 5 6 7 12 7 0.58 12 7 12 7 0.58 12 6 12 4 0.33 12 4 12 5 0.42 12 5 12 6 0.50 12 6 12 8 0.66 12 7 12 7 0.58 12 7 ERP Use Only 0.58 12 7 0.58 12 6 0.50 0.50 12 6 0.50 12 5 0.42 0.33 12 4 0.33 12 5 0.42 0.42 12 5 0.42 12 4 0.33 0.50 12 6 0.50 12 6 0.50 0.58 12 7 0.58 12 6 0.50 0.58 12 7 0.58 12 6 0.50 0.08 0.08 0.00 0.08 0.00 0.00 0.00 0.00 0.00 −0.08 0.08 0.00 0.08 0.08
8 NA NA NA NA NA NA NA NA NA NA NA NA
NA
NA
0.66 12 8 0.66 12 6 0.50
0.16
0.00
9
12 8 0.66 12 8
10 NA NA NA NA NA NA NA NA NA NA NA NA
NA
NA
11 12 13
12 7 0.58 12 6 12 5 0.42 12 5 12 5 0.42 12 5
0.50 12 6 0.50 12 7 0.58 0.42 12 5 0.42 12 4 0.33 0.42 12 5 0.42 12 5 0.42
−0.08
0.08 0.00 0.00
0.08 0.00
MPN, CFU/test portion
Estimate 0.63
All 132 69 0.52 132 66 0.50 132 66 0.50 132 60 0.45
0.04
0.02
LCL UCL
0.49 0.80
0.43 0.61
0.41 0.59
0.41 0.59
0.37 0.54
−0.08
−0.10
0.17
0.15
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