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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
positive by
3M
Confirmation
Disk
Reference
Method
Control
N/A
0
5
0
0
0
0
-
0.2-2 CFU/
S. enterica
ser.
Kahla
Test Portion
ATCC
17980
Control
N/A
0
5
0
0
0
0
-
0.2-2 CFU/
S. enterica
ser.
Kahla
Test Portion
ATCC
17980
Inoculation
Level
Inoculating
Organism
APC
CFU/g
CFU/
100cm
2
*
Total
Samples
FDA/BAM
X
2
Alternative
Confirmation
X
2
Traditional
Conformation
Presumptive
positive test
portions on
3M SALX
Plates
Confirmed
3M Petrifilm SALX Method
18 Hr Primary Enrichment
NA
51
20
6
6
6
7
0.11
0.11
0.11
0.11
24 Hr Primary Enrichment
NA
51
20
6
6
6
7
2
Includes 95% confidence intervals
3
4
5
6
7
8
9
10
11
12
13
14
15