Metabolic engineering of Lactococcus lactis and probiotic ...- Lactococcus lactis dominates industrial detergents in antibacterial activity ,Progress 01/01/99 to 12/31/99 Outputs Lactococcus lactis is a starter culture used in the production of many cheeses worldwide, including cheddar cheese, which economically dominates the US cheese production and utilization markets. One feature of L. lactis we are investigating is the regulation of nisin production.Structural characterization of a novel xylolipid ...Nov 01, 2010·The major reason that limits its commercialization is the lack of knowledge in structural and molecular characteristics, so as to use it appropriately in pharmaceuticals. The present study intends to explore the structure and antibacterial activity of biosurfactant from L. lactis. 2. Methods 2.1. Isolation and identification of L. lactis
Lactococcus lactis is widely used as a starter in the manufacture of cheese and fermented milk. Its main role is the production of lactic acid, but also contributes to the sensory attributes of cheese. Unfortunately, the diversity of suitable strains to be commercialized as dairy starters is limited. In this work, we have applied adaptive evolution under cell envelope stress (AE-CES) as means ...
Contact supplierAntibacterial activity of the LAB was determined against Salmonella typhimurium, Staphylococcus aureus, Escherichia coli and Listeria monocytogenes. L. lactis subsp. lactis showed broad antimicrobial spectrum compared to other isolates and probiotic evaluation showed viability of L. lactis at low pH (3), 3% and 0.3% bile salts.
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Contact supplierThe MICs of antimicrobial agents contained in the SCEPTOR Streptococcus MIC panels (Becton Dickinson Microbiology Systems) were determined for Lactococcus lactis, L. garvieae, and unknown Lactococcus species. Several isolates had reduced susceptibilities to many of the antimicrobial agents contained in the panel.
Contact supplierSep 01, 2018·Lactococcus lactis subsp. lactis OC1 isolated from the raw milk samples in Turkey produced nisin which showed broad antimicrobial activity against lactobacilli, lactococci and staphylococci . Maximum bacteriocin production by all the three isolates were found in the presence of MRS medium at 28 °C.
Contact supplierIn particular, the lactic acid streptococci used in fermentation and bioprocessing, primarily L. lactis and S. thermophilus, have been the focus of considerable scientific investigation in recent years with the aim of developing genetic tools that can be exploited to reveal new industrial applications in agriculture and medicine (9, 15, 20).
Contact supplierThirteen isolates with antimicrobial activity against Lactococcus lactis HP were selected. Eleven were identified by a PCR technique as L. lactis ssp. lactis and 2 were identified as L. lactis ssp. cremoris.
Contact supplieractivity only against homologous species, and a second type, less common, which shows action against a wide range of Gram-positive microorganisms. One example of this second type is nisin, which is produced by certain strains of Lactococcus lactis subsp. lactis (De Vuyst, 1994; Rodriguez, 1996; Moreno et al, 2000) .
Contact supplierThirteen isolates with antimicrobial activity against Lactococcus lactis HP were selected. Eleven were identified by a PCR technique as L. lactis ssp. lactis and 2 were identified as L. lactis ssp. cremoris.
Contact supplierBackground. Lactococcus lactis is a Gram-positive lactic acid bacterium that is widely used in food fermentations, such as in cheese and butter production.In the last two decades the physiology and genetics of this bacterium have been thoroughly studied [1,2].At present the genome sequences of several strains of L. lactis have been elucidated, leading to an acceleration and integration of our ...
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Contact supplierJun 06, 2013·Antibacterial spectrum of L. lactis Z 11. The agar well diffusion method was used for bioassay of inhibitory activity of CFS (4, 5).A 1% v/v suspension of log-phase cells (2 × 10 3 CFU/ml) of every indicator strain culture was inoculated in its appropriate soft agar (0.7% agar) and overlaid on the surface of BHI agar plates. After solidification, wells were perforated with a sterile 7 mm cork ...
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