AOAC ISPAM Quant. Micro Acceptance Criteria 6-28-18

ƒ Develop working group to review and develop Acceptance Criteria ƒ Identify acceptance criteria for current statistical analysis including: • Difference of Means • # of out of range levels per assay (1 per every 2-3 matrix?) • Develop workbook to cover statistical analysis • Conduct workshop with Expert Review Panel Members, Independent Labs and Diagnostic Manufacturers

Quantitative Microbiology Validation Acceptance Criteria

ƒ Example 1: Independent Lab Study for 1 Matrix. • One Level with a statistical difference according to workbook • <0.5 Log 10 difference between methods

95% Confidence Intervals (LCL, UCL) (Log 10 )

Mean Difference a (Log 10 )

Reference Method

Matrix Contamination Level

-0.1434, 0.0264 -0.4981, -0.0539 -0.0794, 0.0953

Low

-0.0585

Raw Fish

FDA/BAM

Medium

-0.2760

High

0.0800

• Low DOM but still significantly different due to low standard deviations between replicates