AOAC-RI ERP Book MICRO Sept 2016.pdf

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

Table 18. 3M Petrifilm SALX Method Comparison Chi-Square Results for Cooked Chicken Nuggets vs USDA (Internal Data) 1

3M Petrifilm SALX Method

Confirmed positive by 3M Confirmation Disk

Presumptive positive test portions on 3M SALX Plates

X 2 Alternative Confirmation

X 2 Traditional Conformation

Inoculation Level

Inoculating Organism

APC CFU/g MPN/25g*

Total Samples

USDA/FSIS- MLG

18 Hr Primary Enrichment

Control

N/A

< 0.075

5

0

0

0

-

-

S. enterica ser. Typhimuriu m

2.4 x 10 2

20

6

6

6

0

0

0.2-2 CFU/

0.03

ATCC 14028

Test Portion

(0.01-0.08)

24 Hr Primary Enrichment

Control

N/A

< 0.075

-

5

0

0

0

-

S. enterica ser. Typhimuriu m

2.4 x 10 2

20

6

6

6

0

0

0.2-2 CFU/

0.03

ATCC 14028

Test Portion

(0.01-0.08)

2 3 4 5 6 7 8 9

*Includes 95% confidence intervals

10 11 12

Made with