Figure 4: Mb reduction test of pathogenic and nonpathogenic listerial species. Comparison of two samples of L. monocytogenes, two samples of L. innocua, and one sample of L. ivanovii versus probe and complementary oligonucleotide (the media of L. monocytogenes against other Listeria species was statistically highly significant: ). Probe, complementary, and DNA samples concentrations were 100 ppm.