AOAC-RI ERP Book Micro Jan 19 2017

Table 2. Candidate Method Testing Results for Ground Beef Matrix 18hr Enrichment ‘Screening Stage’ and ‘Confirmation Stage’ (325 g Ground Beef Analyzed via the 3M TM MDA)

3M MDS 18 h

Rainbow Acid Treated O Serology SBA

H Serology VITEK Confirmation

Sample Number

Inoculum Level

Rainbow

= + + + = + + = = + = = + = + + = = = = = = = = = + + + + +

= + + + = + + = = + = = + = + + = = = = = = = = = + + + + +

= + + + = + + = = + = = + = + + = = = = = = = = = + + + + +

= + + + = + + = = + = = + = + + = = = = = = = = = + + + + +

= + + + = + + = = + = = + = + + = = = = = = = = = + + + + +

1 2 3 4 5 6 7 8 9

LOW LOW LOW LOW LOW LOW LOW LOW LOW LOW LOW LOW LOW LOW LOW LOW LOW LOW LOW LOW

+ + + + +

+ E.coli O157 + E.coli O157 + E.coli O157 + E.coli O157 + E.coli O157

+

+ E.coli O157

10 11 12 13 14 15 16 17 18 19 20

+

+ E.coli O157

+ +

+ E.coli O157 + E.coli O157

1 2 3 4 5 1 2 3 4 5

UNINOC UNINOC UNINOC UNINOC UNINOC

+ + + + +

+ E.coli O157 + E.coli O157 + E.coli O157 + E.coli O157 + E. coli O157

HIGH HIGH HIGH HIGH HIGH

CONFIDENTIAL INFORMATION Page 7 of 13