Abstract
Listeriosis is a rare but potentially serious and harmful infection caused by Listeria monocytogenes. The main route of transmission is through the consumption of contaminated food (Food borne). It generally affects elderly people, pregnant women and immunosuppressed hosts, although cases are also seen in immunocompetent adults and children. Listeria monocytogenes is a short, non-spore-forming gram-positive bacillus. It is a facultative intracellular pathogen, and therefore it shows a complex pathogenesis. L. monocytogenes has the ability to cross the intestinal barrier, the placenta and the blood-brain barrier producing gastroenteritis (GI), maternal-fetal infections and meningoencephalitis. It is most commonly diagnosed from a positive culture of a sterile site. L. monocytogenes cause very serious invasion and often life threatening disease.
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