pH,营养成分和UV-C光处理对水培养营养溶液中的Listeria monocytogenes的影响
Janny Mendoza1, Ivannova Lituma1, Kathryn Fontenot2
1School of Nutrition and Food Sciences, Louisiana State University AgCenter, 261 Knapp Hall, Baton Rouge, LA 70803, United States.
Journal of food protection
|October 6, 2025
概括
水培营养溶液可以支持Listeria monocytogenes的生长,特别是在pH 6. 紫外线治疗有效地降低了各种溶液中的病原体水平,提供了潜在的食品安全干预措施.
科学领域:
- 食品微生物学 食品微生物学
- 环境健康 环境健康
- 园艺科学 园艺科学
背景情况:
- 水培系统越来越多地用于农产品种植.
- 环境病原体如Listeria monocytogenes在这些系统中构成食品安全风险.
- 水栽培中的营养溶液可能支持病原体的生存和生长.
研究的目的:
- 研究Listeria monocytogenes在水培养营养溶液中的生存和生长.
- 评估不同pH值和营养成分对病原体行为的影响.
- 评估紫外线辐射对减少这些溶液中的Listeria monocytogenes的疗效.
主要方法:
- 在蒸水和番茄,生菜和草营养溶液中监测了72小时内Listeria monocytogenes的存活率.
- 实验是在pH值为5,6和7进行的.
- 用UV-C处理 (1.32mW/cm2) 在不同的暴露时间进行,以评估微生物减少.
主要成果:
- 在pH值为5.5的蒸水中,Listeria monocytogenes的存活率有限.
- 和草的营养溶液支持了显著的病原体生长,特别是在pH 6.
- 在所有测试的溶液中,UV-C治疗显著减少了Listeria monocytogenes种群的数量,有效性随着暴露时间的增加而增加.
结论:
- 水培养营养溶液成分和pH值显著影响Listeria monocytogenes的生存和生长.
- 紫外线辐射是一种有前途的方法,用于减少水培系统中的Listeria monocytogenes.
- 需要进一步优化UV-C去污染,以便在水培食品生产中有效应用.
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