AOAC-RI ERP Book MICRO Sept 2016.pdf

Document 2 of 2 – 3M Petrifilm Salmonella Express PTM Study Report

Table 13. 3M Petrifilm SALX Method Comparison Chi-Square Results for Raw Ground Pork vs USDA (Internal Data) 1

3M Petrifilm SALX Method

X 2 Traditional Conformation

X 2 Alternative Confirmation

Inoculation Level

Inoculating Organism

APC CFU/g

USDA/FSIS- MLG

Total Samples

Presumptive Confirmed

MPN/25g*

18 Hr Primary Enrichment – 8 Hr RV-R10 2 0 Enrichment

Control

N/A

< 0.075

5

0

0

0

-

-

S. enterica ser. Montevideo

2.4 x 10 7

20

9

9

9

0

0

0.2-2 CFU/

0.66

Test Portion ATCC 8387

(0.38-1.16)

18 Hr Primary Enrichment – 24 Hr RV-R10 2 0 Enrichment

Control

N/A

< 0.075

5

0

0

0

-

-

S. enterica ser. Montevideo

2.4 x 10 7

9

9

0

0

20

9

0.2-2 CFU/

0.66

Test Portion ATCC 8387

(0.38-1.16)

24 Hr Primary Enrichment – 8 Hr RV-R10 2 0 Enrichment

Control

N/A

< 0.075

5

0

0

0

-

-

S. enterica ser. Montevideo

2.4 x 10 7

20

9

9

9

0

0

0.2-2 CFU/

0.66

Test Portion ATCC 8387

(0.38-1.16)

24 Hr Primary Enrichment – 24 Hr RV-R10 2 0 Enrichment

Control

N/A

< 0.075

5

0

0

0

-

-

S. enterica ser. Montevideo

2.4 x 10 7

20

9

9

9

0

0

0.2-2 CFU/

0.66

Test Portion ATCC 8387

(0.38-1.16)

*Includes 95% confidence intervals

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