Listeria monocytogenes is the types of pathogenic microscopic organisms that causes the disease listeriosis. It is a facultative anaerobic bacterium, fit for making due in the nearness or nonappearance of oxygen. It can develop and duplicate inside the host's cells and is one of the most destructive foodborne pathogens: 20 to 30% of foodborne listeriosis diseases in high-hazard people might be deadly. Answerable for an expected 1,600 sicknesses and 260 passings in the United States every year, listeriosis positions third in the all out number of passings among foodborne bacterial pathogens, with casualty rates surpassing even Salmonella spp. what's more, Clostridium botulinum. In the European Union, listeriosis follows an upward pattern that started in 2008, causing 2,161 affirmed cases and 210 announced passings in 2014, 16% more than in 2013. Listeriosis death rates are additionally higher in the EU than for other foodborne pathogens. its capacity to dodge control in human staples. Motile by means of flagella at 30 °C and beneath, however as a rule not at 37 °C, L. monocytogenes can rather move inside eukaryotic cells by dangerous polymerization of actin fibers (known as comet tails or actin rockets).