食物的光动力解污:评估对Listeria monocytogenes的表面挑战
Anabel Cenit1, Jun Liu2, Michael Fefer2
1Laboratory of Photodynamic Inactivation of Microorganisms, Department of Biosciences and Medical Biology, University of Salzburg, 5020 Salzburg, Austria.
Microorganisms
|January 28, 2026
概括
光动力失活 (PDI) 有效地减少了Listeria monocytogenes在水果表面的存在,无论其质地或应用顺序如何. 这种食品脱污方法为提高食品安全和减少病原体风险提供了一个有希望的解决方案.
科学领域:
- 食品科学与技术 食品科学与技术
- 微生物学 微生物学
- 摄影化学的使用.
背景情况:
- 李斯特菌单细胞菌是一种重要的食物传播病原体,特别对脆弱人群构成风险.
- 传统的净化方法,如热处理,不适合新鲜产品.
- 紫外线或化学处理等替代方法可能会对感官品质或消费者接受产生负面影响.
研究的目的:
- 评估光动力失活 (PDI) 在各种水果表面上的Listeria monocytogenes去污染的有效性.
- 调查水果表面结构 (光滑,不规则,模糊) 和光敏感剂应用顺序对PDI有效性的影响.
- 评估PDI使用--- (Na-Mg-Chl) 作为天然光敏感剂用于食品安全应用.
主要方法:
- 使用了三种不同表面纹理的水果模型 (果,草,桃).
- 果实被注射了Listeria monocytogenes,并用 - - 叶绿素 (Na-Mg-Chl) 处理,随后进行LED照明.
- Na-Mg-Chl的应用顺序 (在细菌注射前或之后) 和水果表面特征各不相同.
主要成果:
- 在所有测试的水果类型 (果,草,果) 中,PDI实现了对Listeria monocytogenes的实质性减少.
- 日志减少在5.61至6.74之间,无论水果表面的复杂性如何,都显示出高效率.
- 应用Na-Mg-Chl的顺序影响了失活率,预先应用通常会产生更高的减少.
结论:
- 光动力失活 (PDI) 是一种高效的方法,可以在各种水果表面对Listeria monocytogenes进行消毒.
- PDI为传统方法提供了一个有前途的替代方案,可以保持产品质量并提高食品安全.
- 该研究支持PDI在减少与食品传播病原体相关的公共卫生风险和经济损失方面的潜力.
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