Antimicrobial microbes-bacteriocin producing lactic acid bacteria
نویسندگان
چکیده
The contribution of lactic acid bacteria (LAB) to the improvement of food safety and stability of fermented foods has long been known. LAB overgrow other microorganisms of the same ecological niche in food products mainly due to lowering the pH, competing for nutrients, producing various antimicrobial substances such as organic acids, hydrogen peroxide, antibiotics and bacteriocins. Among these antimicrobials, bacteriocins have received great attention in recent years. Bacteriocins are ribosomally synthesized antimicrobial peptides that are inhibitory to other microorganisms, either within the same species (narrow spectrum) or across genera (medium to broad spectrum).
منابع مشابه
Effect of Physical and Chemical Changes on the Antimicrobial Activity of Culture Supernatant Fluid of Lactic Acid Bacteria
ABSTRACT Background and Objective: Lactic acid bacteria are Gram-positive, catalase-negative, nonsporulating, either rod- or coccus-shaped bacteria that have beneficial effects on their hosts by producing antimicrobial substances such as lactic acid, hydrogen peroxide, bacteriocins and biosurfactants. Bacteriocins are antimicrobial peptides that a...
متن کاملGenotypic and Phylogenic Analysis of Lactobacilli Producing Bacteriocin Isolated from Traditional Dairy Products and Food
Background & Objective: Lactic acid bacteria (LAB) are a group of Gram-positive, non-spore forming, cocci or rod shaped, catalase negative organisms, considered as Generally Recognized as Safe (GRAS) organisms. These bacteria are used for thousands of years for production of fermented foods because of their ability to produce desirable changes in taste, flavor and texture. Different antimicrobi...
متن کاملAntimicrobial effects of bacteriocins producing lactic acid bacteria isolated from plant origin
متن کامل
GROWTH INHIBITION OF PATHOGENS BY LACTIC ACID BACTERIA PRODUCING INHIBITORY SUBSTANCES
71 samples of milk and dairy products were collected from 18 cities throughout Iran. 93 strains of lactic acid bacteria (LAB) were isolated and assayed against four opportunistic patho gens including E. coli, proteus and klebsiella as gram-negative and S. aureus as a gram-positive organism. All indicators (organisms) were hospital strains. Among isolated bacteria, lactobacilli (37 isolates)...
متن کاملComplete Genome Sequence of Lactobacillus plantarum 10CH, a Potential Probiotic Lactic Acid Bacterium with Potent Antimicrobial Activity
Lactobacillus plantarum 10CH is a bacteriocin-producing potential probiotic lactic acid bacterium (LAB) strain isolated from cheese. Its complete nucleotide sequence shows a single circular chromosome of 3.3 Mb, with a G+C content of 44.51%, a 25-gene plantaricin bacteriocin gene cluster, and the absence of recognized virulence factors.
متن کامل