Abstract
Boza is a low-pH and low-alcohol cereal-based beverage produced in the Balkan Peninsula. From a total population of 9 x 10(6) colony-forming units ml(-1), four isolates (JW3BZ, JW6BZ, JW11BZ, and JW15BZ) produced bacteriocins active against a broad spectrum of Gram-positive bacteria. Bacteriocin JW15BZ inhibited the growth of Klebsiella pneumoniae. The producer strains were identified as Lactobacillus plantarum (strains JW3BZ and JW6BZ) and L. fermentum (strains JW11BZ and JW15BZ). The spectrum of antimicrobial activity, characteristics, and mode of action of these bacteriocins were compared with bacteriocins previously described for lactic-acid bacteria isolated from boza.
MeSH terms
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Anti-Bacterial Agents / biosynthesis
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Anti-Bacterial Agents / metabolism
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Anti-Bacterial Agents / pharmacology
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Bacteriocins / biosynthesis*
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Bacteriocins / metabolism
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Bacteriocins / pharmacology
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Beverages / microbiology*
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Bulgaria
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Culture Media, Conditioned / chemistry
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DNA, Bacterial / genetics
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Edible Grain / metabolism*
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Electrophoresis, Agar Gel
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Electrophoresis, Polyacrylamide Gel
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Fermentation
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Food Microbiology
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Gram-Negative Bacteria / drug effects
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Gram-Negative Bacteria / growth & development
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Growth
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Hydrogen-Ion Concentration
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Indicators and Reagents / chemistry
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Klebsiella pneumoniae / drug effects
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Klebsiella pneumoniae / growth & development
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Lactobacillaceae / genetics
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Lactobacillaceae / metabolism*
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Microbial Sensitivity Tests
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Polymerase Chain Reaction / methods
Substances
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Anti-Bacterial Agents
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Bacteriocins
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Culture Media, Conditioned
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DNA, Bacterial
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Indicators and Reagents