Explain about Listeria monocytogenes infection

Listeria monocytogenes is a gram-positive, motile, non-spore forming rod. It is widely distributed in nature and can be found on decaying vegetation and in soils, animal faeces, sewage, silage and water. In cattle it can result in abortion and mastitis and the infected animals shed the organism in milk. Other infected organisms including sheep and chicken can serve as source of the organism in the food supply.