Heptametallic high‑entropy nanozyme‑based biosensors for detecting bacterial pathogens in food and infected wound

The Quick Summary

Scientists have created a new tiny tool, a special kind of nanozyme called H-HEzyme, made from seven different metals. This H-HEzyme is used to build a quick and simple test that can find bad germs, or bacteria, in food and in infected cuts. The H-HEzyme works really well, like a helper chemical, because of its unique design. The test doesn’t need lots of fancy steps or labels, making it easy to use. It helps find germs that produce a special chemical called catalase. This new tool means we can quickly check for harmful bacteria to keep people safe and healthy.

Practical Implications

This study offers a significant practical implication for food science by providing a rapid and sensitive method for detecting bacterial pathogens in food. Currently, many pathogen detection methods can be slow or require specialized lab equipment, delaying critical food safety decisions. The developed H-HEzyme biosensor, being amplification-free and label-free, could enable on-site testing directly where food is produced, processed, or sold. This capability means that contaminated food could be identified much faster, preventing it from reaching consumers and thus significantly reducing the risk of foodborne illnesses. Ultimately, this technology could enhance food safety protocols, minimize food recalls, and protect public health more effectively and efficiently across the food supply chain.

Potential Use in Indonesia

In Indonesia, where traditional markets and street food vendors are prevalent and a tropical climate promotes bacterial growth, this rapid biosensor could be transformative. It would allow immediate pathogen screening at point of sale or along local supply chains, significantly improving food safety for the diverse range of fresh and prepared foods. This local, quick testing capability could drastically reduce foodborne illness outbreaks linked to these popular food sources.

Original Abstract

Rapid and sensitive on-site detection of bacteria in food and infected wounds is vital for public health. Herein, we report a heptametallic high‑entropy nanozyme (H-HEzyme) and develop an amplification-free and label-free colorimetric platform for catalase (CAT)-positive pathogen detection. The H-HEzyme possessed excellent peroxidase-like activity, thanks to its unique high-entropy structure that optimized active-site properties. The assay relies on competitive H(2)O(2) catalysis between the……

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