4. AOACRIMicroMethods-2018Awards

182

450  C rowley et al . : J ournal of AOAC I nternational V ol . 97, N o . 2, 2014

Table 3. Individual collaborator results for queso fresco a (25 g test portions) VIDAS LMX b 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 1 + + + + + + + + + + + + + + – + – + – + – + – – – – – – – – – – – – – – 2 + + + + + + + + + + + + + + – + + – – – – – – – – – – – – – – – – – – – 3 + + + + + + + + + + + + + – + – + + + + + + – – – – – – – – – – – – – – 4 + + + + + + + + + + + + + + – – – – – + – – c – c – – – – – – – – – – – – 5 + + + + + + + + + + + + – – + – + + + – – – + – – – – – – – – – – – – – 6 + + + + + + + + + + + + + – – + + + – – – + + – – – – – – – – – – – – – 7 + + + + + + + + + + + + + + – – + – – + + + – – – – – – – – – – – – – – 8 + + + + + + + + + + + + – + – + + + – – – – + + – – – – – – – – – – – – 9 + + + + + + + + + + + + – + + + – – – – – + + – – – – – – – – – – – – – 10 + + + + + + + + + + + + + + – + + – – – – + + – – – – – – – – – – – – – 11 d + + + + + + + + + + + + + + + e + – – – + f + – – – – – – – – – – – + e – – + e 12 + + + + + + + + + + + + – – + + + – – + + – + + – – – – – – – – – – – – 13 + + + + + + + + + + + + – – – + + + – + + + – + – – – – – – – – – – – – 14 + + + + + + + + + + + + + – + – + – – + – + – + – – – – – – – – – – – – AOAC 993.12 1 + + + + + + + + + + + + – – + – – + + + + + – – – – – – – – – – – – – – 2 + + + + + + + + + + + + – + – – – – – + + + – + – – – – – – – – – – – – 3 + + + + + + + + + + + + – + – – – + + + + + – + – – – – – – – – – – – – 4 + + + + + + + + + – + + – – + – – – + + – – + – – – – – – – – – – – – – 5 + + + + + + + + + + + + + – – – + + + – + + – – – – – – – – – – – – – – 6 + + + + + + + + + + – – – + – + + – – + + – + + – – – – – – – – – – – – 7 + + + + + + + + + + + + – – – – – – + + + – – + – – – – – – – – – – – – 8 + + + + + + + + + + + + – + – + + + – – – – + – – – – – – – – – – – – – 9 + + + + + + + + + + + + – – + + – + – – – + – – – – – – – – – – – – – – 10 + + + + + + + + + + + + – + + + – – – – – – – + – – – – – – – – – – – – 11 d + + + + + + + + + + + + + + g + g + + h + + + i + + – + h – + h – – – + h – – + j – – – 12 + + + + + + + + + + + + – + – – + – – – + + – + – – – – – – – – – – – – 13 + + + + + + + + + + + + + + + + – + – – – – + + – – – – – – – – – – – – 14 + + + + + + + + + + + + – + – + – + – – + + – – – – – – – – – – – – – – a  + = Listeria spp. were detected in samples; – = Listeria spp. were not detected in sample. b  Confirmed results from OXA and ALOA were identical for each test portion. c Sample was presumptive positive on VIDAS LMX and confirmed negative. d  Results were not used in statistical analysis.

e  Sample presumptive negative on VIDAS LMX, result was reported positive as L. seeligeri . f  Sample was presumptive positive on VIDAS LMX but result was reported positive as L. welshimeri .

g  Result was reported positive as L. innocua . h  Result was reported positive as L. ivanovii . i  Result was reported positive as L. grayi . j Sample confirmed positive as L. monocytogenes .

03/10/2019