从酸白菜中分离出一株产细菌素的乳酸片球菌

本试验从酸白菜中分离出一株有抑制单核细胞增多症李氏杆菌作用的菌株,经鉴定为乳酸片球菌,还对植物乳杆菌、金黄色葡萄球菌、蜡样芽胞杆菌等革兰氏阳性细菌有抗菌作用。该抗菌物质对蛋白水解酶敏感、对过氧化氢酶不敏感、耐热、在较宽的pH范围内保持活性。在排除是有机酸和过氧化氢后,初步认为该菌产生的抗菌物质为抗菌肽,即细菌素。

Isolation of Bacteriocin-producing Pediococcus acidilactici Strain from Fermented Chinese Cabbage

Pediococcus acidilactici was isolated from traditional food fermented Chinese cabbage and screened for bacteriocin strain. The strain was found to produce an extracellular antimicrobial substance that was peptide in nature and effective Against Listeria monocytogenes, Lactobacillus plantarum, Staphylococcus aureus and Bacillus cereus. The antimicrobial peptide is assayed as non organic acid and non hydrogen peroxide. It is sensitive to proteolytic enzymes, resistant to heat, and active over a wide range of pH.