食品科学 ›› 2026, Vol. 47 ›› Issue (14): 362-369.doi: 10.7506/spkx1002-6630-20260126-212

• 安全检测 • 上一篇    

牛奶中金黄色葡萄球菌胶体金免疫层析快速检测方法的建立与应用

卢晨阳,黄晶,王晓娟,杨庆,宫智勇,柳鑫,许琳   

  1. (1.武汉轻工大学食品科学与工程学院,湖北?武汉 430048;2.大宗粮油精深加工教育部重点实验室,湖北?武汉 430048;3.农产品加工与转化湖北省重点实验室,湖北?武汉 430048)
  • 发布日期:2026-08-24
  • 基金资助:
    湖北省自然科学基金一般面上项目(2025AFB918)

Establishment and Application of Colloidal Gold-Based Immunochromatographic Assay for Rapid Detection of Staphylococcus aureus in Milk

LU Chenyang, HUANG Jing, WANG Xiaojuan, YANG Qing, GONG Zhiyong, LIU Xin, XU Lin   

  1. (1. School of Food Science and Engineering, Wuhan Polytechnic University, Wuhan 430048, China; 2. Key Laboratory for Deep Processing of Major Grain and Oil, Ministry of Education, Wuhan 430048, China; 3. Hubei Key Laboratory for Processing and Transformation of Agricultural Products, Wuhan 430048, China)
  • Published:2026-08-24

摘要: 目的:基于胶体金免疫层析技术制备针对金黄色葡萄球菌的快速检测试纸条,并探究其在牛奶样品中的应用。方法:使用胶体金和金黄色葡萄球菌多克隆抗体制备免疫探针。优化反应体系,构建金黄色葡萄球菌免疫层析检测试纸条。验证该试纸条的灵敏度、特异性和准确性,并对牛奶样品进行检测。结果:该试纸条可视检出限为104 CFU/mL,定量检出限为9.52×103 CFU/mL,线性范围为104~107 CFU/mL。结论:本研究研制的试纸条可特异性识别金黄色葡萄球菌,与其他常见食源性致病菌无交叉反应;将该试纸条成功应用于牛奶等实际样本中金黄色葡萄球菌的检测,回收率在82.72%~112.78%之间。本研究建立的方法具备快速、便捷、准确等优势,适用于牛奶中金黄色葡萄球菌的快速初筛。

关键词: 金黄色葡萄球菌;胶体金;快速检测

Abstract: Objective: This study aimed to develop an immunochromatographic test strip (ICS) for the rapid detection of Staphylococcus aureus (S. aureus) and to evaluate its practical applicability in milk matrices. Methods: Immunoprobes were synthesized by conjugating colloidal gold with polyclonal antibodies specific to S. aureus. After optimizing the reaction parameters, we constructed the ICS. The sensitivity, specificity, and accuracy of the assay were rigorously validated, followed by performance testing in spiked milk samples. Results: The visual detection limit of the strip was 104 CFU/mL, and the quantification limit was 9.52 × 103 CFU/mL. The linear range is 104 to 107 CFU/mL. Conclusion: The developed ICS demonstrated high specificity for S. aureus with no cross-reactivity against other common foodborne pathogens. The assay was successfully applied to milk samples, with recoveries ranging from 82.72% to 112.78%. Characterized by its speed, convenience, and reliability, this method provides an effective tool for the rapid on-site monitoring of S. aureus in dairy products.

Key words: Staphylococcus aureus; colloidal gold; rapid detection

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