乳液矩阵会在模拟胃消化过程中影响沙门氏菌的存活率
1Department of Nutrition and Food Science, University of Maryland, College Park, MD, USA. rtikekar@umd.edu.
Food & function
|July 10, 2023
概括
油中的水乳液保护食品传播的病原体,如沙门氏菌 Typhimurium 从模拟的胃酸. 这一发现强调了与这些细菌污染的WO乳液相关的健康风险增加.
科学领域:
- 食品微生物学 食品微生物学
- 食品安全 食品安全
- 细菌的抗压力耐药性是细菌的抗压力.
背景情况:
- 沙门氏菌 (Salmonella enterica serovar Typhimurium) 是一个重要的全球性食物传播病原体.
- 了解食物矩阵如何影响消化道中的细菌生存至关重要.
研究的目的:
- 研究油中的水 (W-O) 和油中的水 (O-W) 乳液结构对在模拟的胃条件下Salmonella Typhimurium存活率的影响.
- 为了确定乳液结构或粘度是否主要有助于细菌保护.
主要方法:
- 将沙门氏菌Typhimurium注射成W-O和O-W乳液.
- 乳液暴露于模拟的胃酸 (pH 2,素) 在37°C与胃混合.
- 细菌在60分钟的生存时间的量化.
主要成果:
- 在60分钟后,W-O乳液显著保护了沙门氏菌 (Salmonella Typhimurium) (1.55 log CFU/ml减少) 与O-W乳液 (4.54 log CFU/ml减少) 相比.
- 细菌的生存归因于W-O乳液结构,而不仅仅是粘度.
- 在W-O乳液中,超过16.3%的细菌居住在油阶段,提高了生存率.
结论:
- W-O乳液结构为沙门氏菌Typhimurium提供了重要的保护,防止胃消化.
- 污染的W-O乳液由于在消化道中增强了病原体的存活率,造成了高的健康风险.
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