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Document 2 of 2 – 3M Petrifilm Salmonella Express PTM Study Report
Table 12. 3M Petrifilm SALX Method Comparison Chi-Square Results for Raw Ground Beef vs USDA (Internal Data)
1
Presumptive
positive test
portions on
3M Petrifilm
SLAX Plates
SALX
Confirmation
Disk Positive
Control
N/A
< 0.075
5
0
0
0
-
-
0.2-2 CFU/
S. enterica
ser.
Ohio
1.07
Test Portion STS 81
(0.65-1.79)
Control
N/A
< 0.075
5
0
0
0
-
-
0.2-2 CFU/
S. enterica
ser.
Ohio
1.07
Test Portion
STS 81
(0.65-1.79)
Control
N/A
< 0.075
5
0
0
0
-
-
0.2-2 CFU/
S. enterica
ser.
Ohio
1.07
Test Portion STS 81
(0.65-1.79)
Control
N/A
< 0.075
5
0
0
0
-
-
0.2-2 CFU/
S. enterica
ser.
Ohio
1.07
Test Portion STS 81
(0.65-1.79)
24 Hr Primary Enrichment – 24 Hr 2
0
RV-R10 Enrichment
3.4 x 10
6
20
13
13
13
0
0
24 Hr Primary Enrichment – 8 Hr 2
0
RV-R10 Enrichment
3.4 x 10
6
20
13
13
13
0
0
0
18 Hr Primary Enrichment – 24 Hr 2
0
RV-R10 Enrichment
3.4 x 10
6
20
13
13
13
0
0
USDA/FSIS-
MLG
X
2
Alternative
Confirmation
X
2
Traditional
Conformation
18 Hr Primary Enrichment – 8 Hr 2
0
RV-R10 Enrichment
3.4 x 10
6
20
13
13
13
0
Inoculation
Level
Inoculating
Organism
APC
CFU/g MPN/25g*
Total
Samples
3M Petrifilm SALX Method
2
*Includes 95% confidence interval
3