ArticleBiosensors2015
A Label-Free Impedance Immunosensor Using Screen-Printed Interdigitated Electrodes and Magnetic Nanobeads for the Detection of E. coli O157:H7.
Article in Biosensors, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.
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Who cites it
17 citing papers in PubMed.
- Advancing non-faradaic impedance biosensors: sensitivity enhancement strategies using microfluidics, multiscale labeling, and CMOS technology.Microsystems & nanoengineering · 2026Review
- FeBiosensors · 2023Article
- Nanomaterials in the Management of Gram-Negative Bacterial Infections.Nanomaterials (Basel, Switzerland) · 2021Review
- On-site detection of food and waterborne bacteria - current technologies, challenges, and future directions.Trends in food science & technology · 2021Article
- Review
- Screen-Printed Electrode-Based Sensors for Food Spoilage Control: Bacteria and Biogenic Amines Detection.Biosensors · 2020Review
- A review on impedimetric immunosensors for pathogen and biomarker detection.Medical microbiology and immunology · 2020Review
- Recent Progress on the Electrochemical Biosensing ofBiosensors · 2020Review
- Recent progress in nanomaterial-based electrochemical biosensors for pathogenic bacteria.Mikrochimica acta · 2019Review
- An aptasensor for the detection of Mycobacterium tuberculosis secreted immunogenic protein MPT64 in clinical samples towards tuberculosis detection.Scientific reports · 2019Article
- Use of an Insulation Layer on the Connection Tracks of a Biosensor with Coplanar Electrodes to Increase the Normalized Impedance Variation.Biosensors · 2019Article
- Influence of Electrode Connection Tracks on Biological Cell Measurements by Impedance Spectroscopy.Sensors (Basel, Switzerland) · 2019Article
- Bacterial Concentration Detection using a PCB-based Contactless Conductivity Sensor.Micromachines · 2019Article
- Recent advances in rapid pathogen detection method based on biosensors.European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology · 2018Review
- A Portable Impedance Immunosensing System for Rapid Detection of Salmonella Typhimurium.Sensors (Basel, Switzerland) · 2017Article
- An Electrochemical Aptasensor Using Coaxial Capillary with Magnetic Nanoparticle, Urease Catalysis and PCB Electrode for Rapid and Sensitive Detection ofNanotheranostics · 2017Article
- Magnetic Particles Coupled to Disposable Screen Printed Transducers for Electrochemical Biosensing.Sensors (Basel, Switzerland) · 2016Review
Corrections and comments
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Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Escherichia coli O157:H7 is one of the leading bacterial pathogens causing foodborne illness. In this study, an impedance immunosensor based on the use of magnetic nanobeads and screen-printed interdigitated electrodes was developed for the rapid detection of E. coli O157:H7. Magnetic nanobeads coated with anti-E. coli antibody were mixed with an E. coli sample and used to isolate and concentrate the bacterial cells. The sample was suspended in redox probe solution and placed onto a screen-printed interdigitated electrode. A magnetic field was applied to concentrate the cells on the surface of the electrode and the impedance was measured. The impedance immunosensor could detect E. coli O157:H7 at a concentration of 10(4.45) cfu·mL(-1) (~1400 bacterial cells in the applied volume of 25 μL) in less than 1 h without pre-enrichment. A linear relationship between bacteria concentration and impedance value was obtained between 10(4.45) cfu·mL(-1) and 10(7) cfu·mL(-1). Though impedance measurement was carried out in the presence of a redox probe, analysis of the equivalent circuit model showed that the impedance change was primarily due to two elements: Double layer capacitance and resistance due to electrode surface roughness. The magnetic field and impedance were simulated using COMSOL Multiphysics software.
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