AOAC-RI ERP Book MICRO Sept 2016.pdf
Document 2 of 2 – 3M Petrifilm Salmonella Express PTM Study Report
Table 15. 3M Petrifilm SALX Method Comparison Chi-Square Results for Spinach vs BAM (Internal Data) 1
3M Petrifilm SALX Method
Confirmed
Presumptive positive test portions on 3M SALX Plates
Confirmed positive by 3M Confirmation Disk
X 2 Alternative Confirmation
X 2 Traditional Confirmation
Reference Method
Total Samples
Inoculation Level
Inoculating Organism
APC CFU/25g MPN/25g*
FDA/BAM
18 Hr Primary Enrichment – 8 Hr RV-R10 2 0 Enrichment
Control
N/A
< 0.075
5
0
0
0
0
-
S. enterica ser. Saintpaul
1.0 x 10 7
20
7
7
11
10
0.9
0.2-2 CFU/
0.77
Test Portion ATCC 9712
(0.41-1.36)
18 Hr Primary Enrichment – 24 Hr RV-R10 2 0 Enrichment
Control
< 0.075
N/A
5
0
0
0
0
-
S. enterica ser. Saintpaul
1.0 x 10 7
20
11
11
11
10
0.1
0.2-2 CFU/
0.77
Test Portion ATCC 9712
(0.41-1.36)
24 Hr Primary Enrichment – 8 Hr RV-R10 2 0 Enrichment
Control
N/A
< 0.075
5
0
0
0
0
-
S. enterica ser. Saintpaul
1.0 x 10 7
20
7
7
11
10
0.9
0.2-2 CFU/
0.77
Test Portion ATCC 9712
(0.41-1.36)
24Hr Primary Enrichment – 24 Hr RV-R10 2 0 Enrichment
Control
N/A
< 0.075
5
0
0
0
0
-
S. enterica ser. Saintpaul
1.0 x 10 7
20
11
11
11
10
0.1
0.2-2 CFU/
0.77
Test Portion ATCC 9712
(0.41-1.36)
2 3
*Includes 95% confidence intervals
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