在干燥食品加工表面上进行抗菌雾预处理,以增强超热蒸汽在禁活Enterococcus faecium NRRL B-2354中的有效性
Shruthy Seshadrinathan1, V M Balasubramaniam2, Abigail B Snyder3
1Department of Food Science and Technology, The Ohio State University, Columbus, OH, 43210, USA.
Food microbiology
|December 4, 2025
概括
抗微生物预处理提高了干燥食品环境的超热蒸汽 (SHS) 卫生. 在SHS系统中,较高的蒸汽含量对于在不钢表面有效的微生物无活化至关重要.
科学领域:
- 食品安全 食品安全
- 微生物学 微生物学
- 环境卫生技术 环境卫生技术
背景情况:
- 超热蒸汽 (SHS) 是干燥食品加工的新兴卫生方法.
- 不钢的微生物污染在这些环境中构成风险.
- 优化SHS疗效需要了解影响微生物失活的因素.
研究的目的:
- 评估与SHS相结合的抗微生物预处理对在不钢上无活化Enterococcus faecium的有效性.
- 为了比较SHS的有效性,使用不同蒸汽含量的实验室规模和试点规模的系统.
- 确定预处理类型和SHS参数对微生物减少的影响.
主要方法:
- 接种了Enterococcus faecium的不钢优惠券经过预处理 (水,乙醇,酸,酸化油乳液).
- 预处理的优惠券使用基板级 (100%蒸汽) 和试点级 (5%蒸汽) 系统暴露在SHS中.
- 微生物幸存者被用盘子计数来计算,以确定日志CFU/cm2减少.
主要成果:
- 仅仅使用抗菌素预处理就产生了最小的微生物减少 (<2.0 log CFU/cm2).
- 基板尺度SHS (100%蒸汽) 实现了显著的无活化 (>6.4日志CFU/cm2) 无论预处理.
- 试验规模的SHS (5%蒸汽) 显示了较低的减少 (<2.8日志CFU/cm2),在更高的强度 (3.3日志CFU/cm2) 中略有改善.
结论:
- 抗微生物预处理可以增加SHS卫生效率.
- SHS环境的蒸汽含量是微生物无活化的一个关键因素.
- 对优化SHS参数和蒸汽输送进行进一步的研究是有效的食品加工卫生的必要条件.
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