Duplex real-time PCR assay with high-resolution melt analysis for the detection and quantification of Listeria species and Listeria monocytogenes in meat products

被引：0

作者：

M. R. Vishnuraj

G. Ajay

N. Aravind Kumar

J. Renuka

Niveditha Pollumahanti

H. Anusha Chauhan

S. Vaithiyanathan

Deepak B. Rawool

S. B. Barbuddhe

机构：

[1] ICAR - National Meat Research Institute,

来源：

Journal of Food Science and Technology | 2023年 / 60卷

关键词：

Genus Listeria; Listeria monocytogenes; Real-time PCR; High resolution melt analysis; Duplex assay;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Listeria contamination in foods of animal origin is one of the most concerning food safety issues. A duplex, SYBR green-based, real-time PCR assay was developed with high-resolution melting analysis-based differentiation of the genus Listeria and Listeria monocytogenes. The primers were designed and tested against other related foodborne pathogens. The assay was optimized for standard parameters in a non-orthogonal fashion and validated following international standards. The LODabs and LOQ of the assay were calculated to be 0.78 and 1.56 ng of the target DNA. The LODrel of the assay was found to be 1% Listeria DNA in background DNA. The assay was evaluated for applicability in artificially spiked samples, providing a 120 CFU/ml detection. The assay was validated with proficiency test samples and also with samples collected for surveillance analysis. This well-established and validated assay can be utilized as a qualitative and quantitative tool for addressing the Listeria contamination in the food safety contexts.

引用

页码：1541 / 1550

页数：9

共 186 条

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