4. AOACRIMicroMethods-2018Awards

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818  B ird et al . : J ournal of AOAC I nternational V ol . 96, N o . 4, 2013

Table 4. Individual collaborator results for raw ground beef (375 g test portions) using traditional confirmation a High-level test portions Low-level test portions Uninoculated test portions Lab 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12 VIDAS SPT (traditional confirmation) 1 + + + + + + + + + + + + + + + + + – – – + – – – – – – – – – – – – – – – 2 b + + + + + + + + + + – + + + + – – – + + – + – – – – – – – – – – + – – – 3 – + + + + + + + + + + + + + + + – – – – – + – – – – – – – – – – – – – – 4 + + + + + + + + + + + + + + – + – c – – – – – – NA – – – – – – – – – – – – 5 b + + + + + + + + + + + + + – + – – – – – + – + + – – – – – – – – – + – + 6 + + + + + + + + + + + + + – + + – + + – + – – – – – – – – – – – – – – – 7 + + + + + + + + + + + + + + + – – – + – – + – – – – – – – – – – – – – – 8 b NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NANANA 9 + + + + + + + + + + + + + + + – + + – + + – – – – – – – – – – – – – – – 10 + + + + + + + + + + + + + + + – + – – + + – – – – – – – – – – – – – – – 11 + + + + + + + + + + + + – – – – – – – – – – – – – – – – – – – – – – – – 12 + + + + + + + + + – + + + + + – – – – – + + + + – – – – – – – – – – – – 13 + + + + + + + + + + + + + + + – – + + + + – – – – – – – – – – – – – – – 14 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NANANA 15 + + + + + + + + + + + + + + + – – – – – + + – + – – – – – – – – – – – – USDA/FSIS-MLG 1 + + + + + + + + + + + + + + – – + + + – – – – – – – – – – – – – – – – – 2 b + + + + + + + + + + + – – + + – – – – – – – – – – – – – – – – – – – – – 3 + + + + + + + + + + + + – – + – + + – – – – – – – – – – – – – – – – – – 4 + + + + + + + + + + + + + + – + + + + + + + – – – – – – – – – – – – – – 5 b + + + + + + + + + + + + – – + – – – – – – – – – – – + – – – – – – – – – 6 + + + + + + + + + + + + – + – + + + + – – – – – – – – – – – – – – – – – 7 + + + + + + + + + + + + + – – + + + + + – – – – – – – – – – – – – – – – 8 b NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NANANA 9 + + + + + + + + + + + + – – – – + + + + – – – – – – – – – – – – – – – – 10 + + + + + + + + + + + + + + – – – + – + – + – – – – – – – – – – – – – – 11 + + + + + + + + + + + + – – – + + + + + + – – – – – – – – – – – – – – – 12 + + + + + + + + + + + + – – + + + + – + – – – – – – – – – – – – – – – – 13 + + + + + + + + + + + + – + + – + – – – + + – – – – – – – – – – – – – – 14 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NANANA 15 + + + + + + + + + + + + + – – – – + – + + – – – – – – – – – – – – – – – a  + = Salmonella spp. were detected in samples; – =Salmonella spp. were not detected in sample; NA = laboratory did not participate in this matrix or results were not received. b  Results were not used in statistical analysis due to laboratory error. c  Sample was confirmed negative using the reference method agars XLT4 and BGS, but confirmed positive on ASAP agar.

between presumptive and confirmed VIDAS SPT results. The confidence intervals obtained for dLPOD CP indicated no significant difference between the presumptive and confirmed values of –0.02 (–0.05, +0.02) were obtained between the USDA/FSIS-MLG method and the VIDAS SPT method. The confidence intervals obtained for dLPOD C indicated no significant difference between the two methods. dLPOD CP values of 0.00 (–0.04, +0.04) were obtained between presumptive and confirmed VIDAS SPT results. The confidence intervals obtained for dLPOD CP indicated no significant difference between the presumptive and confirmed 03/10/2019 results using either confirmation process. For the high-level inoculum, dLPOD C

results. Detailed results of the POD statistical analysis are presented in Table 2013.01B and in appended Table D and Figure 2A and B.

Traditional Confirmation with IBISA and ASAP

For the high level, 130 of the 132 test portions were reported as positive by the VIDAS SPT method, with all portions confirming positive. For the low level, 58 of 131 test portions were reported as positive by the VIDAS SPT method, with 59 confirming positive. For the uninoculated controls, none of the 132 samples produced a presumptive positive result by the VIDAS SPT method and all