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For the low inoculation level at 10, 12 and 18 hours, there were 15 presumptive and confirmed positives for the
candidate method and 14 confirmed positives for the USDA/FSIS reference method. A POD
C
value of 0.75 was
obtained with 95% confidence intervals of (0.53, 0.89). A POD
R
value of 0.70 was obtained with 95% confidence
intervals of (0.48, 0.85). A dPOD
C
value of 0.05 was obtained with 95% confidence intervals of (-0.22, 0.31),
indicating no statistical difference between the candidate and reference method. For the low inoculation level at each
time point a POD
CP
value and a POD
CC
value of 0.75 was obtained with 95% confidence intervals of (0.53, 0.89). A
dPOD
CP
value of 0.00 with 95% confidence intervals of (-0.26, 0.26) indicating no statistical difference between the
candidate method presumptive and confirmed results.
For the high inoculation level at 10, 12 and 18 hours, there were 5 presumptive and confirmed positives for the
candidate method and 5 confirmed positives for the reference method. A POD
C
and POD
R
value of 1.00 was
obtained with 95% confidence intervals of (0.57, 1.00). A dPOD
C
value of 0.00 was obtained with 95% confidence
intervals of (-0.43, 0.43), indicating no statistical difference between the candidate and reference method. A POD
CP
value and a POD
CC
value of 1.00 was obtained with 95% confidence intervals of (0.57, 1.00). A dPOD
C
value of
0.00 was obtained with 95% confidence intervals of (-0.43, 0.43), indicating no statistical difference between the
candidate method presumptive and confirmed results.
Raw Ground Beef – 375 g
For the low inoculation level at 10, 12 and 18 hours, there were 15 presumptive and confirmed positives for the
candidate method and 14 confirmed positives for the USDA/FSIS reference method. A POD
C
value of 0.75 was
obtained with 95% confidence intervals of (0.53, 0.89). A POD
R
value of 0.70 was obtained with 95% confidence
intervals of (0.48, 0.85). A dPOD
C
value of 0.05 was obtained with 95% confidence intervals of (-0.22, 0.31),
indicating no statistical difference between the candidate and reference method. For the low inoculation level at each
time point a POD
CP
value and a POD
CC
value of 0.75 was obtained with 95% confidence intervals of (0.53, 0.89). A
dPOD
CP
value of 0.00 with 95% confidence intervals of (-0.26, 0.26) indicating no statistical difference between the
candidate method presumptive and confirmed results.
For the high inoculation level at 10, 12 and 18 hours, there were 5 presumptive and confirmed positives for the
candidate method and 5 confirmed positives for the reference method. A POD
C
and POD
R
value of 1.00 was
obtained with 95% confidence intervals of (0.57, 1.00). A dPOD
C
value of 0.00 was obtained with 95% confidence
intervals of (-0.43, 0.43), indicating no statistical difference between the candidate and reference method. A POD
CP
value and a POD
CC
value of 1.00 was obtained with 95% confidence intervals of (0.57, 1.00). A dPOD
C
value of
0.00 was obtained with 95% confidence intervals of (-0.43, 0.43), indicating no statistical difference between the
candidate method presumptive and confirmed results.
Raw Ground Chicken - 25 g
For the low inoculation level at 10, 12, 14, and 18 hours, there were 16 presumptive and confirmed positives for the
candidate method and 11 confirmed positives for the USDA/FSIS reference method. A POD
C
value of 0.80 was
obtained with 95% confidence intervals of (0.58, 0.92). A POD
R
value of 0.55 was obtained with 95% confidence
intervals of (0.34, 0.74). A dPOD
C
value of 0.25 was obtained with 95% confidence intervals of (-0.04, 0.49),
indicating no statistical difference between the candidate and reference method. For the low inoculation level at each
time point a POD
CP
value and a POD
CC
value of 0.80 was obtained with 95% confidence intervals of (0.58, 0.92). A
dPOD
CP
value of 0.00 with 95% confidence intervals of (-0.25, 0.25) indicating no statistical difference between the
candidate method presumptive and confirmed results.
For the high inoculation level at 10, 12, 14 and 18 hours, there were 5 presumptive and confirmed positives for the
candidate method and 5 confirmed positives for the reference method. A POD
C
and POD
R
value of 1.00 was
obtained with 95% confidence intervals of (0.57, 1.00). A dPOD
C
value of 0.00 was obtained with 95% confidence
intervals of (-0.43, 0.43), indicating no statistical difference between the candidate and reference method. A POD
CP
value and a POD
CC
value of 1.00 was obtained with 95% confidence intervals of (0.57, 1.00). A dPOD
C
value of
0.00 was obtained with 95% confidence intervals of (-0.43, 0.43), indicating no statistical difference between the
candidate method presumptive and confirmed results.
Raw Ground Chicken - 325 g
2013.09 /PTM Matrix Extension Report
March 2014
Expert Review Panel Use Only
AOAC Research Institute
Expert Review Panel Use Only