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Document 2 of 2 – 3M Petrifilm Salmonella Express PTM Study Report
Table 14. 3M Petrifilm SALX Method Comparison Chi-Square Results for Uncooked Frozen Shrimp vs BAM (Internal Data)
1
Confirmed
positive by
3M
Confirmation
Disk
Reference
Method
Control
N/A
< 0.075
5
0
0
0
0
-
0.2-2 CFU/
S. enterica
ser.
Virchow
0.77
Test Portion
ATCC
51955
(0.41-1.36)
Control
N/A
< 0.075
5
0
0
0
0
-
0.2-2 CFU/
S. enterica
ser.
Virchow
0.77
Test Portion
ATCC
51955
(0.41-1.36)
Control
N/A
< 0.075
5
0
0
0
0
-
0.2-2 CFU/
S. enterica
ser.
Virchow
0.77
Test Portion
ATCC
51955
(0.41-1.36)
Control
N/A
< 0.075
5
0
0
0
0
-
0.2-2 CFU/
S. enterica
ser.
Virchow
0.77
Test Portion
ATCC
51955
(0.41-1.36)
X
2
Alternative
Confirmation
X
2
Traditional
Confirmation
Presumptive
positive test
portions on
3M SALX
Plates
Confirmed
18 Hr Primary Enrichment – 8 Hr RV-R10 2
0
Enrichment
Inoculation
Level
Inoculating
Organism
MPN/25g*
Total
Samples
3M Petrifilm SALX Method
FDA/BAM
12
10
0.39
18 Hr Primary Enrichment – 24 Hr RV-R10 2
0
Enrichment
4.0 x 10
4
20
12
12
0.39
24 Hr Primary Enrichment – 8 Hr RV-R10 2
0
Enrichment
4.0 x 10
4
20
12
12
4.0 x 10
4
20
12
12
12
10
0.39
APC
cfu/g
12
10
0.39
24 Hr Primary Enrichment – 24 Hr RV-R10 2
0
Enrichment
4.0 x 10
4
20
12
12
12
10
2
*Includes 95% confidence intervals
3