滴滴数字聚合酶连锁反应试验用于量化肉样中的沙门氏菌
Yingying Liang1, Yangtai Liu2, Xin Liu2
1Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China.
Foods (Basel, Switzerland)
|January 28, 2026
概括
一种新的滴滴数字PCR (ddPCR) 试验准确量化了食品中的沙门氏菌. 这种快速方法为食品安全风险评估的传统技术提供了可行的替代方案.
科学领域:
- 食品微生物学 食品微生物学
- 分子诊断学 分子诊断
- 食品安全科学 食品安全科学
背景情况:
- 沙门氏菌是一种主要的食源性病原体,在全球引起沙门氏菌病.
- 准确量化沙门氏菌对于微生物学标准和风险评估至关重要.
- 传统的方法,如盘子计数和最可能的数 (MPN) 是耗时和劳动密集型.
研究的目的:
- 开发和验证一种新型滴滴数字PCR (ddPCR) 试验,用于快速准确量化沙门氏菌.
- 与传统方法相比,评估ddPCR试验的性能.
主要方法:
- 开发一种针对沙门氏菌的 invA 基因的 ddPCR 试验.
- 在肉样本中验证试验的特异性,灵敏度和量化极限.
- 将ddPCR结果与传统的盘子计数和生长动力学的数学建模进行比较.
主要成果:
- ddPCR测定显示了高特异性和灵敏度.
- 在肉样本中,量化极限被确定为1.1 × 10^2殖民地形成单位/毫升.
- 在ddPCR和盘子计数测量之间观察到强烈的线性相关性 (R^2 > 0.99),在生长动力学建模中具有高相关系数 (0.996).
结论:
- 滴滴数码PCR (ddPCR) 是一种可行的,强大的替代方法,用于Salmonella量化MPN方法.
- 开发的ddPCR测定提供了一个快速,具体和敏感的工具,用于对食品安全的定量风险评估.
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