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Foodborne Pathogen Screening Using Magneto-fluorescent Nanosensor: Rapid Detection of E. Coli O157:H7
Published on: September 17, 2017
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Aggregation-induced emission silence-mediated pathogen detection using a rapidly degradable nanographene-embedded
Chia-Yi Cheng1, Eldhose V Varghese1, Wen-Jyun Wang1
1Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 807, Taiwan. chc@kmu.edu.tw.
Journal of Materials Chemistry. B
|September 10, 2024
Summary
This study introduces a novel nanographene (nanoG) embedded in polymersomes for rapid bacterial detection. The system effectively senses pathogenic bacteria, including MRSA, with visual readouts, offering a promising tool for clinical screening.
Area of Science:
- Biomaterials Science
- Nanotechnology
- Analytical Chemistry
Background:
- Conventional pathogen detection methods are slow, costly, and require expertise.
- Rapid and accessible bacterial sensing is crucial for infection control in critical settings.
Purpose of the Study:
- To develop a swift, visual, and accurate method for detecting pathogenic bacteria.
- To synthesize and characterize aggregation-induced emission (AIE) active nanographene (nanoG) embedded within polymersomes.
Main Methods:
- Synthesized nanoG with AIE properties and encapsulated it in poly(lactic-co-glycolic acid) (PLGA) polymersomes via a double-emulsion process.
- Investigated the degradation of PLGA by Gram-positive and Gram-negative bacteria, leading to nanoG dispersal and AIE silencing.
- Established a linear correlation between bacterial concentration and emissivity for quantitative detection.
Main Results:
- The nanoG-PLGA polymersome system demonstrated enhanced luminescence due to nanoG enrichment.
- Bacterial degradation of the polymersome effectively silenced the AIE effect.
- Achieved selective detection of methicillin-resistant Staphylococcus aureus (MRSA) after antibiotic screening, with visual detection possible within 1 hour.
Conclusions:
- The developed nanoG-PLGA polymersome is a sensitive and selective platform for rapid pathogen detection.
- The visual readout capability and speed show significant potential for point-of-care clinical screening applications.
