ISSN: 0973-7510

E-ISSN: 2581-690X

Research Article | Open Access
Mariya Tomy1, Shylaja Ramlal1 , M.M. Parida2 and Joseph Kingston1
1Defence Food Research Laboratory, Mysore, Karnataka, India.
2Defence Research and Development Establishment, Gwalior, Madhya Pradesh, India.
Article Number: 8657 | © The Author(s). 2024
J Pure Appl Microbiol. 2024;18(1):367-380.
Received: 28 April 2023 | Accepted: 01 January 2024 | Published online: 24 February 2024
Issue online: March 2024

Methicillin resistant Staphylococcus aureus harbouring other virulence factors in food is a serious threat to food safety. Delayed detection of MRSA may lead to fatal consequences due to the challenging treatment methods. To address the issue, early prognosis is prerequisite.  We report one step QuEChERS detection method wherein, a media with selective agents such as cefoxitin, cyanidin, lithium chloride and methicillin (CCLM) was formulated for the specific cultivation and detection of MRSA within 5 hours. Direct application of the newly developed method was tested by screening food for MRSA and its comparison with conventional biochemical and molecular characterization. Growth of MRSA in the CCLM media was observed within 4 hours. This highly specific method is sensitive to detect 104 CFU/mL visually and 101 CFU/mL spectrophotometrically.  25% of food samples harboured MRSA which points to an immediate need of consideration by the authorities.  The newly designed QuEChERS cyanin based chromogenic detection system is unequivocal with the conventional and molecular method of MRSA detection and can be of great use in diagnostic and in food safety laboratories.


MRSA, QuEChERS, Anthocyanin, CCLM Media, mPCR, Antibiotic Resistant

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© The Author(s) 2024. Open Access. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License which permits unrestricted use, sharing, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.