Salmonella, Listeria spp., and Listeria monocytogenes
GeneQuence’s DNA hybridization assays employ target pathogenspecific
DNA probes directly labeled with horseradish peroxidase,
and a colorimetric endpoint to detect as little as one CFU of the target
pathogen in a 25 g food sample. A sample is considered positive
for the presence of the target pathogen if the absorbance value (A450)
obtained is greater than or equal to 0.10. Presumptively positive
samples should be confirmed by standard approved methods.