Recent studies concerning virulence-associated genes, such as Imo0460, prs, PrfA, hly, hlyA, iap, flaA, actA, inlA, plcA, plcB, IgY, and inlB, and those involving the pathogenesis of the Listeriosis process have been published [30-32]. This evidence concerns the gene KRCC1 and listeriosis.