Bacterial genomic DNA was extracted using the silica column
method with the General Rapid Easy Extraction System (GREES)DNA kit (InCura S.r.l., Cremona, Italy), according to the manufacturer’s instructions. Before DNA extraction, milk samples wereclarified as described by Rasolofo et al. [22], and 1 mL was used forboth the experiment and the NWC samples. Grated 48-h cheeseswere ground in a mortar and 450 mg were then used