“…Concerning L. monocytogenes, the most widely used targets for its specific detection are the genes hlyA which encodes for the listeriolisin O (Elizaquível et al, 2011;Kobayashi et al, 2009;Navas et al, 2006;Omiccioli et al, 2009;Rodriguez-Lazaro, Hernández, et al, 2004;Ruiz-Rueda et al, 2010;Suo et al, 2010), and the prfA which is a central virulence regulator of this bacterium (D'Urso et al, 2009;Jofré et al, 2005;Rossmanith, Krassnig, Wagner, & Hein, 2006). Additionally, the iap gene, coding the protein p60 essential for cell viability, has also been applied (Flekna, Stefanic, et al, 2007;Mukhopadhyay & Mukhopadhyay, 2007;Wuenscher, Köhler, Bubert, Gerike, & Goebel, 1993).…”