ERP Micro December 2019

Table 2019.2A . Comparative results for the Detection of Listeria species in full-cream goat milk cottage cheese (8.4% fat) test portions by the GENE-UP ® 1 Listeria spp. 2 (LIS 2) method vs. ISO 11290-1/Amd.1 in a collaborative study (non-inoculated control) 2

Candidate presumptive (CP)

Candidate confirmed (CC)

Candidate result (C)

Reference method (R)

C vs. R CP vs. CC

Statistic

Matrix

Laboratory

POD (CP) 0.00 0.00 0.00 0.00 0.00 0.38 0.00 0.00 0.00 0.00 N/A 0.00 0.00 0.00 0.00 0.00 0.03 0.01 0.08 0.13 0.12 0.17 0.08 0.05 0.15 0.16 0.14 0.20

POD (CC) 0.00 0.00 0.00 0.00 0.00 0.25 0.00 0.00 0.00 0.00 N/A 0.00 0.00 0.00 0.00 0.00 0.02 0.00 0.06 0.12 0.11 0.17 0.05 0.02 0.09 0.13 0.12 0.16

POD (C) 0.00 0.00 0.00 0.00 0.00 0.25 0.00 0.00 0.00 0.00 N/A 0.00 0.00 0.00 0.00 0.00 0.02 0.00 0.06 0.12 0.11 0.17 0.05 0.02 0.09 0.13 0.12 0.16

POD (R) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.25 0.25 0.00 N/A 0.00 0.00 0.00 0.00 0.00 0.03 0.01 0.08 0.17 0.15 0.20 0.06 0.02 0.13 0.18 0.16 0.22

dLPOD (C,R)

dLPOD (CP,CC)

N

X

N

X

N

X

N

X

1 2 3 4 5 6 7 8 9

8 8 8 8 8 8 8 8 8 8 8 8 8 8 8

0 0 0 0 0 3 0 0 0 0 0 0 0 0 0

8 8 8 8 8 8 8 8 8 8 8 8 8 8 8

0 0 0 0 0 2 0 0 0 0 0 0 0 0 0

8 8 8 8 8 8 8 8 8 8 8 8 8 8 8

0 0 0 0 0 2 0 0 0 0 0 0 0 0 0

8 8 8 8 8 8 8 8 8 8 8 8 8 8 8

0 0 0 0 0 0 0 2 2 0 0 0 0 0 0

0.00 0.00 0.00 0.00 0.00 0.25 0.00 -0.25 -0.25 0.00 N/A 0.00 0.00 0.00 0.00 0.00

0.00 0.00 0.00 0.00 0.00 0.13 0.00 0.00 0.00 0.00 N/A 0.00 0.00 0.00 0.00 0.00

Full-Cream Goat Milk Cottage Cheese (8.4% Fat)

10

11 a

N/A N/A

N/A N/A

N/A N/A

N/A N/A

12 13 14 15 16

Estimate

All

120

3

120

2

120

2

120

4

-0.02 -0.07 0.03

0.01 -0.04 0.06

LCL UCL LCL UCL LCL UCL UCL LCL s r b s L c s R d

P T e 0.0199 a Collaborator Data Not Included in Statistical Analysis, b Repeatability Standard Deviation, c Among-Laboratory Standard Deviation, d Reproducibility Standard Deviation, e P T 0.0001 0.0123 0.0123

3 4

Value = Homogeneity test of laboratory PODs

N - Number of Test Portions; X – Number of Positive Test Portions; LCL – Lower Confidence Limit; UCL – Upper Confidence Limit

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