快速检测Salmonella Typhimurium 在细胞附着期间在三个与食物接触的表面使用长读序列测序
Daniela Bermudez-Aguirre1, Shannon Tilman1, Joseph Uknalis2
1Characterization and Interventions for Foodborne Pathogens Research Unit, Eastern Regional Research Center, United States Department of Agriculture, Agricultural Research Service, 600 East Mermaid Lane, Wyndmoor, PA 19038, USA.
Microorganisms
|March 27, 2025
概括
长读测序在一小时内检测到沙门氏菌在食品表面的早期附着,优于传统方法. 这一进步使得及时的卫生干预能够防止食物传播疾病的爆发.
科学领域:
- 食品安全微生物学
- 基因组监测 基因组监测
- 生物膜形成的形成
背景情况:
- 沙门氏菌 spp. 沙门氏菌 它们是导致食物传播疾病的重要原因,经常与蛋和蛋制品有关.
- 控制与食品接触表面的沙门氏菌污染是具有挑战性的,因为它有能力形成生物膜并抵抗卫生.
- 早期检测沙门氏菌的附着性对于实施有效的卫生干预措施至关重要.
研究的目的:
- 调查长读测序对早期检测沙门氏菌附着菌的有效性.
- 为了比较长读测序与传统的微生物学方法来检测沙门氏菌.
- 在早期阶段 (0-5小时) 评估沙门氏菌在不钢,和尼龙表面的附着性.
主要方法:
- 利用长时间读取的全基因组测序来识别沙门氏菌.
- 采用传统的微生物学盘子计数来进行比较.
- 在不钢,和尼龙表面上监测沙门氏菌的附着性,持续5小时.
主要成果:
- 传统的盘子计数在化3小时后检测到沙门氏菌 (<1日志CFU/cm2).
- 显示的附着度最高 (0.87 log CFU/cm2),其次是不钢 (0.70 log CFU/cm2).
- 长读测序在所有测试表面 (不钢,,尼龙) 上发现了沙门氏菌,仅在化1小时后.
结论:
- 长读测序提供了一种高度敏感的方法来检测低度的沙门氏菌.
- 与传统方法相比,这种技术可以显著提前检测沙门氏菌的附着.
- 通过长时间读取序列的早期检测可以促进食品加工环境的及时卫生干预.
相关概念视频
High-Performance Liquid Chromatography: Types of Detectors
401
The role of the detectors in High-Performance Liquid Chromatography (HPLC) is to analyze the solutes as they exit from the chromatographic column. The detector recognizes the solute's property and generates corresponding electrical signals, which are converted into a readable graph of the detector's response versus elution time called a chromatogram at the computer. There are several types of HPLC detectors, each with its own advantages and limitations, depending on the analyte...
401
Gas Chromatography: Types of Detectors-II
301
In gas chromatography, different detectors are employed to meet specific analytical needs. These detectors are often categorized based on their detection mechanisms and the types of compounds they are best suited to analyze. Thermal Conductivity Detectors (TCD), Flame Ionization Detectors (FID), and Electron Capture Detectors (ECD) represent common categories, each with unique operating principles and applications. However, beyond these, several other detectors are designed for more specialized...
301


