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Document 2 of 2 – 3M Petrifilm Salmonella Express PTM Study Report
Table 11. 3M Petrifilm SALX Method Comparison Chi-Square Results for Raw Ground Chicken vs USDA/FSIS MLG (Internal Data)
1
SALX
Confirmation
Disk Positive Reference
Control
N/A
< 0.075
5
0
0
0
0
-
0.2-2 CFU/
S. enterica
ser.
Heidelberg
1.15
Test Portion NCTC 5717
(0.70-2.07)
Control
N/A
< 0.075
5
0
0
0
0
-
0.2-2 CFU/
S. enterica
ser.
Heidelberg
1.15
Test Portion NCTC 5717
(0.70-2.07)
Control
N/A
< 0.075
5
0
0
0
0
-
0.2-2 CFU/
S. enterica
ser.
Heidelberg
1.15
Test Portion NCTC 5717
(0.70-2.07)
Control
N/A
< 0.075
5
0
0
0
0
-
0.2-2 CFU/
S. enterica
ser.
Heidelberg
1.15
Test Portion NCTC 5717
(0.70-2.07)
USDA/FSIS
MLG
Presumptive
positive test
portions on
3M Petrifilm
SLAX Plates
Confirmed
18 Hr Primary Enrichment – 8 Hr RV-R10 2
o
Enrichment
X
2
Alternative
Confirmation
X
2
Traditional
Confirmation
Inoculation
Level
Inoculating
Organism
APC
CFU/g MPN/25g*
Total
Samples
3M Petrifilm SALX Method
7.1 x 10
3
-
20
15
15
14
14
0.12
0
18 Hr Primary Enrichment – 24 Hr RV-R10 2
o
Enrichment
7.1 x 10
3
-
20
15
15
14
14
0.12
0
24 Hr Primary Enrichment – 8 Hr RV-R10 2
o
Enrichment
7.1 x 10
3
-
20
15
15
14
14
0.12
0
24 Hr Primary Enrichment – 8 Hr RV-R10 2
o
Enrichment
7.1 x 10
3
-
20
15
15
14
14
0.12
0
2
*Includes 95% confidence interval
3