Abstract: A bacteriocin-producing strain was isolated from infant feces. With the morphological observation, physiological and biochemical characteristics and sequencing of the 16S rDNA, this strain was identified to be a gram\|positive Lactobacillus plantarum. Bacteriocin activity was degraded by proteolytic enzymes (trypsin, proteinase K etc.), and it was stable at high temperatures (100℃, 30 min), in a range of pH 2-4. The bacteriocin showed antimicrobial activity against Staphylococcus aureus, Escherichia coli, Salmonella species.

Key words: Lactobacillus plantarum, bacteriocin, antibacterial substances