The primers targeting specific genes i.e. iap and hlyA used in PCR assay were standardized by optimizing the
annealing temperatures, primer concentration, MgCl2 concentration, template volume and cycling conditions. The
primer sequences for iap and hlyA used by [5] standardization of PCR assay in this study that allowed amplification
at 131 bp for iap (Fig.1) and at 456 bp for hlyA (Fig.2) genes respectively which were in accordance with the
findings of my study. These PCR products were stored at -200c for further use.
The results for the presence of Listeria monocytogenes different samples are represented in Table 3.