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产生细菌素的乳球菌种对抗Enterococcus faecium的生物保护作用,该菌种从埃及Tallaga奶酪中分离出来
Seila Agún1, Olivia Youssef1, Sally Ashry2
1Instituto de Productos Lácteos de Asturias, The Spanish National Research Council (CSIC), C/Francisco Pintado Fe, 26, 33011 Oviedo, Asturias, Spain.
Antibiotics (Basel, Switzerland)
|January 28, 2026
概括
肠球菌,而不是典型的乳酸细菌,主导着埃及塔拉加奶酪,构成食品安全风险. 生产细菌素的乳球菌株 (Lactococcus lactis) 显示出对这些耐药菌株的天然生物防腐剂的潜力.
科学领域:
- 食品微生物学 食品微生物学
- 乳制品科学 乳制品科学
- 食品安全 食品安全
背景情况:
- 塔拉加奶酪是一种传统的埃及软白奶酪,具有高湿度,盐度和短保质期,增加了污染风险.
- 从原始或极小加热的牛奶生产使其成为食品安全挑战的典范.
- 商业样本显示出变异性,缺乏典型的乳酸细菌 (LAB).
研究的目的:
- 为了研究塔拉加奶酪的微生物组成.
- 确定和评估从塔拉加奶酪中分离的LAB的抗菌潜力.
- 评估特定的LAB菌株对乳制品污染物的生物保护能力.
主要方法:
- 商业Tallaga奶酪样本的微生物分析.
- 实验室的隔离和识别.
- 针对Latilactobacillus sakei*的孤立LAB的抗菌活性测试.
- 在实验室规模的奶酪模型中,对 *Enterococcus faecium * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
主要成果:
- 与典型物种不同的是,菌,特别是*Enterococcus faecium*,是占主导地位的LAB.
- 确定了12种生产细菌素的LAB菌株,包括*Enterococcus faecalis*,*E. faecium*和*Lactococcus lactis*.
- 在一种奶酪模型中,两种*Lactococcus lactis*菌株显著抑制了*Enterococcus faecium*的2.6和3.6日志单位.
结论:
- 塔拉加奶酪中的肠球菌由于抗微生物耐药性和毒性特征而引发了食品安全问题.
- 产生细菌素的*Lactococcus lactis*菌株是有效的天然生物防腐剂.
- 这些发现凸显了L. lactis在乳制品中控制新出现的食源性病原体的潜力.
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