在用有机酸处理的硬蛋上Listeria monocytogenes的无活化动力学
Hui Zeng1, Bashayer A Khouja1,2, Megan L Fay2
1Department of Food Science and Nutrition, Illinois Institute of Technology, Bedford Park, IL 60501, USA.
Foods (Basel, Switzerland)
|September 13, 2025
概括
有机酸,特别是2%的酸,乳酸和酸,在控制剥皮硬蛋 (HCE) 上的Listeria monocytogenes污染方面显示出希望. 这些治疗方法显著减少了细菌种群,提高了消费者的食品安全.
科学领域:
- 食品科学 食品科学 食品科学
- 微生物学 微生物学
- 食品安全 食品安全
背景情况:
- 剥皮硬蛋 (HCE) 容易受到Listeria monocytogenes的污染,这是最近爆发和召回的证据.
- 抗微生物治疗,包括酸等有机酸,用于提高HCE的安全性和质量.
- 2019年多个州爆发的疫情促使进一步调查有机酸对L. monocytogenes在HCEs上的有效性.
研究的目的:
- 评估各种有机酸作为抗菌剂对L. monocytogenes在HCEs上的有效性.
- 为了确定不同度和温度对细菌减少的影响.
- 使用初级建模分析L. monocytogenes的失活动力学.
主要方法:
- 用L. monocytogenes接种HCE,以达到大约8logCFU/HCE.
- 经过10分钟的空气干燥期,HCE在5°C或25°C下用水,0.3%或2%的酸或2%的酸,乳酸或酸处理长达24小时.
- 测量了细菌种群减少,并使用韦布尔和日志线性模型确定了无活化动力学.
主要成果:
- 0.3%的酸处理导致L. monocytogenes的最小减少 (<1.24 log CFU/HCE),无论温度如何.
- 使用2%,乳酸和酸度的处理方法在25°C时实现了2.35-5.10 log CFU/HCE,在5°C时达到2.88-4.78 log CFU/HCE的统计显著降低.
- 减少L. monocytogenes的最有效的治疗方法是2%的酸在5°C和2%的酸在25°C.
- 初级建模表明,在25°C时,2%的果酸和乳酸具有快速无活化率.
结论:
- 2%的,乳酸和酸显示出作为有效的治疗方法来控制L. monocytogenes在HCEs上的污染的潜力.
- 较高度 (2%) 和特定有机酸比较低度 (0.3%) 或水更有效.
- 温度对这些抗微生物治疗的疗效起着作用,不同酸的最佳条件各不相同.
更多相关视频
11:47Evaluation of the Efficacy of Organic Peroxyacids for Eradicating Dairy Biofilms Using an Approach Combining Static and Dynamic Methods
Published on: December 9, 2022
2.1K
08:08An Assay for Measuring the Activity of Escherichia coli Inducible Lysine Decarboxyase
Published on: December 19, 2010
14.6K
相关概念视频
Physical Methods for Controlling Microbial Growth: Temperature
956
Heat is a widely used method to control microbial growth by targeting and denaturing cellular proteins, thereby killing or inactivating microbes. This method's effectiveness is quantified using parameters such as the thermal death point (TDP), thermal death time (TDT), and decimal reduction time (D value). TDP represents the lowest temperature at which all microorganisms in a liquid suspension are eliminated within 10 minutes, whereas TDT is the time necessary to achieve sterilization at a...
956
Methods of Sterilization II: Chemical Methods
8.9K
In healthcare, the chemical method of sterilization uses chemical sterilants to treat surgical instruments and medical supplies to help prevent the transmission of infectious pathogens to patients. Due to heat sensitivity, most medical supplies and equipment should not be exposed to high temperatures. These parts include rubber, plastic, glass, and other similar elements.
Using chemical sterilization rather than heat to clean out equipment is recommended. It eradicates and removes all bacteria,...
Using chemical sterilization rather than heat to clean out equipment is recommended. It eradicates and removes all bacteria,...
8.9K
