100 percent natural and organic, PhageGuard Listex is an FDA-approved organic solution that specifically combats Listeria. The PhageGuard advantage is precision. It is targeted to eliminate Listeria monocytogenes in your food products, without affecting taste, odor or texture. Listeria monocytogenes are pathogenic bacteria that can cause Listeriosis. These bacteria pose issues for food processors. PhageGuard Listex is a proven antimicrobial against Listeria monocytogenes.