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For raw ground beef test portions, there were 15 confirmed positives for the 3MMolecular Detection
1
Assay
Salmonella
samples and 11 confirmed positives for the USDA/FSIS-MLG samples. All un-
2
inoculated control samples were negative for both methods. A χ
2
value of 1.71 was obtained,
3
indicating no significant difference the 3M Molecular Detection Assay
Salmonella
samples and the
4
USDA/FSIS-MLG reference method.
5
6
Cooked Breaded Chicken
7
For cooked breaded chicken test portions, there were 11 confirmed positives for the 3M Molecular
8
Detection Assay
Salmonella
samples and 12 confirmed positives for the USDA/FSIS-MLG samples. All
9
un-inoculated control samples were negative for both methods. A χ
2
value of 0.10 was obtained,
10
indicating no significant difference the 3M Molecular Detection Assay
Salmonella
samples and the
11
USDA/FSIS-MLG reference method.
12
13
Pasteurized Liquid Whole Eggs
14
For pasteurized liquid whole egg test portions, there were 18 confirmed positives for the 3M
15
Molecular Detection Assay
Salmonella
samples and 13 confirmed positives for the USDA/FSIS-MLG
16
samples. All un-inoculated control samples were negative for both methods. A χ
2
value of 3.49 was
17
obtained, indicating no significant difference the 3M Molecular Detection Assay
Salmonella
samples
18
and the USDA/FSIS-MLG reference method.
19
20
Raw Shrimp
21
For raw shrimp test portions, there were 5 confirmed positives for the 3M Molecular Detection Assay
22
Salmonella
samples and 8 confirmed positives for the FDA/BAM samples. All un-inoculated control
23
samples were negative for both methods. A χ
2
value of 1.0 was obtained, indicating no significant
24
difference the 3M Molecular Detection Assay
Salmonella
samples and the FDA/BAM reference
25
method.
26
27
Bagged Spinach
28
For bagged spinach test portions, there were 9 confirmed positives for the 3MMolecular Detection
29
Assay
Salmonella
samples and 7 confirmed positives for the FDA/BAM samples. All un-inoculated
30
control samples were negative for both methods. A χ
2
value of 0.41 was obtained, indicating no
31
significant difference the 3MMolecular Detection Assay
Salmonella
samples and the FDA/BAM
32
reference method.
33
34
Wet Pet Food
35
For wet pet food test portions, there were 8 confirmed positives for the 3M Molecular Detection Assay
36
Salmonella
samples and 5 confirmed positives for the FDA/BAM samples. All un-inoculated control
37
samples were negative for both methods. A χ
2
value of 1.0 was obtained, indicating no significant
38
difference the 3M Molecular Detection Assay
Salmonella
samples and the FDA/BAM reference
39
method.
40
41
INDEPENDENT LABORATORY STUDY
42
The independent laboratory study was conducted at Food Safety Net Services, San Antonio, Texas.
43
The study was conducted according to the method comparison protocol described above for raw
44
ground beef and cooked breaded chicken.
45
46
Raw Ground Beef - Independent
47
15