沙门氏菌干表面生物膜:形态学,单细胞景观和消毒
Zejia Lin1, Zhiqian Liang1, Shuang He1
1Department of Food Science and Technology, National University of Singapore, , Singapore.
Applied and environmental microbiology
|November 4, 2024
概括
沙门氏菌Typhimurium形成干表面生物膜 (DSB),具有独特的生存特征,对低湿度食品安全构成风险. 莫林与异醇相结合,显示出作为一种有效的干净化消毒剂,用于控制食品加工中的DSB.
科学领域:
- 微生物学 微生物学
- 食品科学 食品科学 食品科学
- 生物技术是生物技术.
背景情况:
- 沙门氏菌 (Salmonella Typhimurium) 等食源性病原体形成的干表面生物膜 (DSB) 在低湿度食品 (LMF) 加工环境中提出了重大挑战.
- 了解DSB的独特特征和生存机制对于开发有效的控制策略至关重要,以确保食品安全并防止经济损失.
研究的目的:
- 综合调查和描述沙门氏菌 Typhimurium DSB 的形成,并将其与湿表面生物膜 (WSB) 的发展进行比较.
- 通过微生物组单细胞转录学来探索DSB内的沙门氏菌的功能异质性和生存机制.
- 为了评估潜在的干净化剂,特别是与异醇结合的黄类药物,在LMF行业的背景下对DSB的有效性.
主要方法:
- 使用共聚焦激光扫描显微镜和电子显微镜来比较DSB和WSB之间的结构和形态差异.
- 微生物组单细胞转录组学被用来分析DSB内的沙门氏菌细胞的代谢活性和功能能力.
- 对39种与70%异醇 (IPA) 结合的黄素进行了选,以评估它们作为干净化剂对DSB的有效性.
主要成果:
- 与WSB相比,DSB表现出不同的特征,包括均分散,在大囊中压缩的细胞,以及占主导地位的红细胞信号.
- 虽然超过60%的干燥沙门氏菌细胞在代谢上是不活跃的,但部分细胞保留了抗氧化和毒性能力,这表明LMF安全性存在潜在风险.
- 莫林与70%的IPA结合时,与单独的IPA相比,在降低DSB中的沙门氏菌活力方面表现出显著更大的有效性,绿色:红色比率显著降低.
结论:
- 沙门氏菌DSB具有独特的结构和生存特征,这引起了低湿度食品安全的担忧.
- 莫林,配制70%的IPA,显示出作为有效干净化消毒剂的潜力,用于控制食品工业中的沙门氏菌DSB,提供无水消毒解决方案.
- 这项研究为DSB控制策略提供了关键的见解,有助于提高低湿度食品加工中的食品安全实践.
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