Lactic acid bacteria can be considered as natural biopreservative and good biotechnological alternative to food safety. In this study, the antilisterial compounds produced by Enterococcus isolates from the Patagonian environment and their effectiveness for the control of Listeria monocytogenes in a food model were studied. Enterococcus isolates whose cell-free supernatant presented activity against Listeria monocytogenes were identified and evaluated for their virulence factors. The activity of the antimicrobial compounds produced by Enterococcus sp. against Listeria monocytogenes Scott A in meat gravy and ground beef during refrigerated storage was tested. The results indicated that ten Enterococcus isolates presented activity against Listeria monocytogenes and none of the selected strains presented virulence factors. L. monocytogenes in the food models containing the antilisterial compounds produced by Enterococcus sp. has decreased over the days, indicating that these compounds and cultures are an alternative to control the growth of L. monocytogenes in foods.

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评估乳酸菌对碎牛肉中单核细胞增生李斯特菌的生物保护潜力

乳酸菌可以被认为是天然的生物防腐剂和食品安全的良好生物技术替代品。在这项研究中，研究了来自巴塔哥尼亚环境的肠球菌分离株产生的抗利斯特氏菌化合物及其在食物模型中控制单核细胞增生李斯特氏菌的有效性。鉴定出无细胞上清液对单核细胞增生李斯特菌具有活性的肠球菌分离株，并对其毒力因子进行评估。肠球菌属产生的抗菌化合物的活性。对冷藏期间肉汁和碎牛肉中的单核细胞增生李斯特菌 Scott A 进行了测试。结果表明，10 株肠球菌分离株表现出抗单核细胞增生李斯特菌的活性，且所选菌株均未表现出毒力因子。L。含有肠球菌产生的抗利斯特氏菌化合物的食物模型中的单核细胞增生症。几天来一直在减少，这表明这些化合物和培养物是控制食物中单核细胞增生李斯特氏菌生长的替代方法。