abstract       background and objective: probiotics are living microorganisms that have beneficial effects on the health of digestive system. the aim of this study was to evaluate the antimicrobial ability of acidic and neutral supernatants (culture supernatant) of lactic acid bacteria against common bacterial pathogens.        methods: four species of lactic acid bacteria (lactobacillus planta...

Chemical and molecular taxonomic studies were performed on a representative strain of some lactic acid bacteria of unknown taxonomic position isolated from salmonid fish. The results demonstrate that the fish bacterium represents a new species of the genus Lactococcus for which the name Lactococcus piscium sp. nov. is proposed. The type strain of Lactococcus piscium is NCFB 2778.

Lactococcus garvieae is a Gram-positive bacterium considered an important opportunistic emerging human pathogen and also a well-recognized fish pathogen. Here, we present the draft genome sequence of Lactococcus garvieae strain 21881 (2,164,557 bp, with a G+C content of 37.9%), which represents the first report of a genome sequence on Lactococcus garvieae.

Lactococcus lactis (L. lactis) is an important gram-positive bacterium in dairy products. It is a rare cause of opportunistic infections with only four cases of Lactococcus peritoneal dialysis (PD) peritonitis reported in the literature. In Korea, L. lactis infection was first reported in a liver abscess patient in 2010; however, PD peritonitis with Lactococcus has not been reported in Korea. R...

Citrate metabolism in the lactic acid bacterium Leuconostoc mesenteroides generates an electrochemical proton gradient across the membrane by a secondary mechanism (C. Marty-Teysset, C. Posthuma, J. S. Lolkema, P. Schmitt, C. Divies, and W. N. Konings, J. Bacteriol. 178:2178-2185, 1996). Reports on the energetics of citrate metabolism in the related organism Lactococcus lactis are contradictory...

A strain of lactic acid bacteria, designated 159469T, isolated from a facial abscess in a sugar glider, was characterized genetically and phenotypically. Cells of the strain were Gram-stain-positive, coccoid and catalase-negative. Morphological, physiological and phylogenetic data indicated that the isolate belongs to the genus Lactococcus. Strain 159469T was closely related to Lactococcus garv...

We report here the complete genome sequence of Lactococcus lactis subsp. lactis strain A12, a strain isolated from sourdough. The circular chromosome and the four plasmids reveal genes involved in carbohydrate metabolism that are potentially required for the persistence of this strain in such a complex ecosystem.

enterococcus and lactococcus are gram-positive cocci that often occur in pairs ( diplococci ) or short chains, and are difficult to differentiate from streptococci on physical characteristics alone. enterococcus faecium because have concern antibiotic resistant, consider difficult as probiotic. the results of an assay show that a probiotic e. faecium strain might be a potential recipient of van...

background and objectives: importance of development of novel probiotic fermented milk and challenge made for its acceptability is well known. in this research, the impact of different inoculation sizes of yogurt and dl-type starter culture (mesophilic and thermophilic lab) on titratable acidity, viscosity, sensorial and microbial properties of fermented milk was investigated; and finally, prob...

this study evaluated the antimicrobial activities of two lactic acid bacteria, lactococcus lactis subsp. lactis i23 and lactococcus lactis subsp. lactis e91, against brochothrix thermosphacta in pork meat during storage at ambient temperature (30°c) for 168 h. the lab strains and the spoilage organism were inoculated on fresh pork samples at 1×106 cfug-1. results showed about 3 log reduction in...