AOAC-RI ERP Book MICRO Sept 2016.pdf
Document 2 of 2 – 3M Petrifilm Salmonella Express PTM Study Report
Table 19. 3M Petrifilm SALX Method Comparison Chi-Square Results for Stainless Steel vs BAM (Internal Data) 1
Confirmed 3M Petrifilm SALX Method
Confirmed positive by 3M Confirmation Disk
Presumptive positive test portions on 3M SALX Plates
X 2 Alternative Confirmation
X 2 Traditional Conformation
CFU/ 100cm 2 *
Reference Method
Inoculation Level
Inoculating Organism
APC CFU/g
Total Samples
FDA/BAM
18 Hr Primary Enrichment
Control
N/A
0
5
0
0
0
0
-
S. enterica ser. Kahla
NA
0.2-2 CFU/
51
20
6
6
6
7
0.11
0.11
ATCC 17980
Test Portion
24 Hr Primary Enrichment
Control
N/A
0
5
0
0
0
0
-
S. enterica ser. Kahla
NA
0.2-2 CFU/
51
20
6
6
6
7
0.11
0.11
ATCC 17980
Test Portion
2 3 4 5 6 7 8 9
Includes 95% confidence intervals
10 11 12 13 14 15
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