Listeria monocytogenes is nonspore-forming, gram-positive rods, it is a widespread bacterium; it can survive for a long time in different environments such as food, soil, water, and feces causing adverse health impacts in both animals and humans. Because of its pathogenesis mechanism combined with its ubiquity, It's considereda serious concern. Invasive listeriosis could be without symptoms until 1-4 weeks after infection. It causes serious complications especially in pregnant women, newborn babies, and people with weakened immunity if left untreated. An example of its outbreak what happened in South Africa in January 2018, which resulted in 180 deaths.