High Quality Content by WIKIPEDIA articles! Lactococcus lactis is a Gram-positive bacterium used extensively in the production of buttermilk and cheese, but has recently also become famous as the first genetically modified organism to be used alive for the treatment of human disease.L. lactis cells are cocci that group in pairs and short chains, and, depending on growth conditions, appear ovoid with typically 0.5 - 1.5 µm in length. L. lactis does not produce spores (nonsporulating) and are not motile (nonmotile). They have a homofermentative metabolism and have been reported to produce exclusively L(+) lactic acid. However, reported D(-) lactic acid can be produced when cultured at low pH. The capability to produce lactic acid is one of the reasons why L. lactis is one of the most important microorganisms in the dairy industry. Based on its history in food fermentation L. lactis has the GRAS status (Generally Regarded As Safe) with few case reports of being an opportunistic...

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