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Effect of Rocket (Eruca sativa) Extract on MRSA Growth and Proteome: Metabolic Adjustments in Plant-Based Media
Agapi I Doulgeraki1, Georgios Efthimiou2, Spiros Paramithiotis3
1Laboratory of Microbiology and Biotechnology of Foods, Department of Food Science and Human Nutrition, Agricultural University of AthensAthens, Greece.
Abstract:
The emergence of methicillin-resistant Staphylococcus aureus (MRSA) in food has provoked a great concern about the presence of MRSA in associated foodstuff. Although MRSA is often detected in various retailed meat products, it seems that food handlers are more strongly associated with this type of food contamination. Thus, it can be easily postulated that any food could be contaminated with this pathogen in an industrial environment or in household and cause food poisoning. To this direction, the effect of rocket (Eruca sativa) extract on MRSA growth and proteome was examined in the present study. This goal was achieved with the comparative study of the MRSA strain COL proteome, cultivated in rocket extract versus the standard Luria-Bertani growth medium. The obtained results showed that MRSA was able to grow in rocket extract. In addition, proteome analysis using 2-DE method showed that MRSA strain COL is taking advantage of the sugar-, lipid-, and vitamin-rich substrate in the liquid rocket extract, although its growth was delayed in rocket extract compared to Luria-Bertani medium. This work could initiate further research about bacterial metabolism in plant-based media and defense mechanisms against plant-derived antibacterials.
Insights
Methicillin-resistant Staphylococcus aureus (MRSA) can grow in rocket extract, a plant-based medium. While its growth is slower, MRSA utilizes the nutrients present in the rocket extract.
Area of Science:
- Food safety and microbiology
- Bacterial metabolism and adaptation
- Plant-based antimicrobials
Background:
- Methicillin-resistant Staphylococcus aureus (MRSA) is a significant foodborne pathogen.
- Food handlers are a key source of MRSA contamination in food products.
- Understanding MRSA's interaction with alternative growth media is crucial for food safety.
Purpose of the Study:
- To investigate the effect of rocket (Eruca sativa) extract on MRSA growth.
- To analyze the proteomic changes in MRSA when cultivated in rocket extract.
- To compare MRSA's growth and proteome in rocket extract versus a standard growth medium.
Main Methods:
- Cultivation of MRSA strain COL in liquid rocket extract and Luria-Bertani medium.
- Comparative proteomic analysis using 2D-gel electrophoresis (2-DE).
- Assessment of MRSA growth rates in both media.
Main Results:
- MRSA strain COL demonstrated the ability to grow in rocket extract.
- MRSA growth was observed to be delayed in rocket extract compared to Luria-Bertani medium.
- Proteomic analysis revealed MRSA utilizes sugars, lipids, and vitamins from the rocket extract.
Conclusions:
- Rocket extract supports MRSA growth, indicating potential for contamination in food processing.
- MRSA adapts to utilize nutrients in plant-based media, highlighting metabolic flexibility.
- Further research into bacterial metabolism in plant-based environments and plant-derived antibacterial mechanisms is warranted.
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