高压加工影响了从食品和加工环境中隔离的Listeria monocytogenes中的抗生素耐药性基因转移
Patryk Wiśniewski1, Wioleta Chajęcka-Wierzchowska1, Anna Zadernowska1
1Department of Food Microbiology, Meat Technology and Chemistry, Faculty of Food Science, University of Warmia and Mazury, Plac Cieszyński 1, 10-726 Olsztyn, Poland.
International journal of molecular sciences
|December 17, 2024
概括
高压处理 (HPP) 可以增加Listeria monocytogenes等食物传播细菌的抗生素耐药性基因转移,特别是在更高的压力下. 这引发了公众健康的担忧,即抗生素耐药性通过食物链传播.
科学领域:
- 食品微生物学 食品微生物学
- 抗微生物耐药性 抗微生物耐药性
- 食品加工技术 食品加工技术
背景情况:
- 抗生素耐药性基因 (ARG) 转移是一个重大的公共卫生问题.
- 高压加工 (HPP) 是一种食品保存方法,对细菌遗传学有潜在的影响.
- 李斯特菌 (Listeria monocytogenes) 是一种常见的食物传播病原体.
研究的目的:
- 研究HPP对L. monocytogenes中抗生素耐药性基因转移的影响.
- 为了比较HPP在体外和现场 (食品矩阵) 的影响.
- 评估HPP诱导的ARG转移对公共卫生的影响.
主要方法:
- L. monocytogenes 菌株在 200 MPa 和 400 MPa 时受到 HPP 的影响.
- 使用膜波器方法分析了抗生素耐药性基因转移频率.
- 实验是在微生物介质 (体外) 和胡卜汁 (体内) 中进行的.
- 进行了最小抑制度 (MIC) 和基因型分析.
主要成果:
- 较高的HPP压力 (400 MPa) 显著增加了氏素 (fosX) 和四环素 (tet_A1,tet_A3,tetC) 耐药基因的转移频率.
- 在任何HPP条件下都没有观察到对西普洛素耐药性基因 (Lde) 的转移.
- 食品矩阵 (胡卜汁) 显示出可变性,表明具有保护作用并改变了HPP的疗效.
- 转结合剂在HPP后表现出增加的MIC值和基因型变化.
结论:
- 在食品环境中,HPP可以促进L. monocytogenes中的抗生素耐药性基因转移.
- 无声的ARG可以被调动,通过食物链构成公共卫生风险.
- HPP对ARG转移的影响依赖于菌株,抗生素和条件,需要仔细的过程优化.
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