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微滴法快速有效地计算牛奶中的细菌殖民地形成单位

Kristi L Jones¹, Nicole Adams², Anna M Lundgren²

¹Department of Large Animal Clinical Sciences, University of Florida, Gainesville, FL 32608.

JDS communications

|November 12, 2025

概括

一种新的微滴方法用于在牛奶中计算Escherichia coli P4,大大降低了牛乳炎研究的成本和处理时间. 这种方法保持了严谨性和可重复性,为标准金技术提供了更有效的替代方案.

科学领域:

兽医微生物学兽医微生物学
牛乳腺炎研究牛乳腺炎研究
细菌计数技术细菌计数技术

背景情况:

在体内微生物挑战模型对于理解牛乳腺炎机制至关重要.
准确的细菌负载计数在牛奶中对于评估干预的有效性至关重要.
用于细菌计数的标准涂装方法耗时且昂贵.

研究的目的:

评估微滴法作为一个成本效益和时间效率高的替代方法,用于在牛奶中列出埃舍里奇亚大肠杆菌P4.
与标准涂层相比,评估微滴方法的严谨性和可重复性.
为了确定微滴方法的灵敏度和经济可行性.

主要方法:

使用微滴法对细菌计数进行比较,与使用E. coli P4增值牛奶样本对标准盘子计数进行比较.
线性回归和布兰德-阿尔特曼分析以评估方法之间的一致性.
消耗成本的敏感性测试和经济分析.

主要成果:

微滴法与标准盘子计数相比,没有显著差异或技术人员偏见.
微滴法显示出轻微的正偏差与度成比例.
微滴法实现了10^3 CFU/mL的灵敏度,超过qPCR (10^4 CFU/mL),并将成本降低近50%.

结论:

微滴法提供了一种严格,可复制和具有成本效益的方法,用于在乳腺炎研究中列举牛奶中的大肠杆菌P4.
在4°C或-80°C保存牛奶样本不会影响CFU计数,允许批处理.
这种方法有可能在病原体监测和临床诊断中得到更广泛的应用.

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