LmAV-2 and LmAV-6 strains have the LIPI-3, harboring the genes IIs to encode Listeriolysin S (LLS), which is a bacteriocin with cytotoxic and hemolytic activity that modifies the host microbiota during infection and contributes to survival in polymorphonuclear neutrophils [15,21,22]. This evidence concerns the gene LIPI and infection.