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From:
Published online 2011 May 1. doi: 10.4161/bact.1.3.16710

Table 2

Listeria detection in artificially contaminated smoked salmon and chocolate milk

Assay variablesSalmonChocolate milk
1 cfu/g10 cfu/g1 cfu/g10 cfu/g
24 h selective enrichment/2.5 h non-selective enrichment MUG assay 180 min+
24 h selective enrichment/2.5 h non-selective enrichment MUG assay 360 min+++
24 h selective enrichment/5.5 h non-selective enrichment MUG assay 180 min+a+a
24 h selective enrichment/5.5 h non-selective enrichment MUG assay 360 min+a+a
48 h selective enrichment/5.5 h non-selective enrichment MUG assay 180 min+++
48 h selective enrichment/5.5 h non-selective enrichment MUG assay 360 min+++
aSignal-to-noise ratio increased significantly compared to values obtained after 2.5 h of incubation.