Development of dual polymerase spiral reaction for detection of Listeria monocytogenes and Staphylococcus aureus simultaneously

Moran Zhang; Hongzhou Chen; Jiaming Huang; Yongjin Dai; Yujuan Liu; Xiyao Zhou; Xiangfei Li; Xinyi Pang; Jing Sun; Yingjian Lu

doi:10.1016/j.ijfoodmicro.2024.111055

Development of dual polymerase spiral reaction for detection of Listeria monocytogenes and Staphylococcus aureus simultaneously

Int J Food Microbiol. 2025 Jan 3:430:111055. doi: 10.1016/j.ijfoodmicro.2024.111055. Online ahead of print.

Authors

Moran Zhang¹, Hongzhou Chen², Jiaming Huang³, Yongjin Dai¹, Yujuan Liu¹, Xiyao Zhou¹, Xiangfei Li¹, Xinyi Pang¹, Jing Sun⁴, Yingjian Lu⁵

Affiliations

¹ College of Food Science and Engineering, Nanjing University of Finance and Economics, Nanjing, China.
² Anhui Guotai Zhongxin Testing Technology Co., Ltd, Hefei, China.
³ College of Food Science and Technology, Nanjing Agricultural University, Nanjing, China.
⁴ College of Food Science and Engineering, Nanjing University of Finance and Economics, Nanjing, China. Electronic address: jingsun@nufe.edu.cn.
⁵ College of Food Science and Engineering, Nanjing University of Finance and Economics, Nanjing, China. Electronic address: yingjianlu@nufe.edu.cn.

PMID: 39756071
DOI: 10.1016/j.ijfoodmicro.2024.111055

Abstract

Listeria monocytogenes and Staphylococcus aureus are prevalent foodborne pathogens responsible for poisoning humans with food. The present study was devoted to the establishment of a method based on dual polymerase spiral reaction (dual-PSR) and melting curve analysis for concurrent identification L. monocytogenes and S. aureus. Specifically, the primer pairs were aimed at the conserved hlyA gene of L. monocytogenes and that of S. aureus (nuc). These reactions were carried out isothermally at 65 °C for 45 min within the same reaction vessel, and the amplified products were analyzed in a melting curve. Different average temperatures of melting allow the discrimination in the dual-PSR assay between the two target bacteria. The limits of simultaneous determination of L. monocytogenes and S. aureus in artificially contaminated fresh-cut fruit samples were 1 × 10^-4 ng of genomic DNA and 1 × 10² CFU/g, respectively. This method is characterized by its expeditious nature and simultaneous detection capability, and it promises to be a valuable technology for the monitoring of pathogenic microorganisms around health and quality control of foodstuffs within that industry.

Keywords: Dual polymerase spiral reaction; Foodborne pathogens; Listeria monocytogenes; Staphylococcus aureus.