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Related Concept Videos

Microbial Biosensors01:17

Microbial Biosensors

88
Microbial biosensors are analytical devices that utilize living microbes to detect specific substances through measurable signals. These devices consist of two main components: biosensing organisms and signal-transducing elements. Biosensing organisms, such as Escherichia coli or Saccharomyces cerevisiae, are typically housed in multiwell plates connected to transducers, enabling rapid, real-time detection of target analytes.Signal Generation MechanismWhen a target analyte—such as...
88

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Related Experiment Video

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Bacterial Detection & Identification Using Electrochemical Sensors
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Pathogen-Specific Electrochemical Real-Time LAMP Detection Using Universal Solid-Phase Probes on Carbon Electrodes.

Martin Trotter1, Andreas Schreiber1,2, Dominic Kleinknecht1

  • 1Hahn-Schickard, 79110 Freiburg, Germany.

ACS Sensors
|December 25, 2024
PubMed
Summary
This summary is machine-generated.

A novel electrochemical assay uses a universal probe on sensing electrodes for rapid pathogen detection. This adaptable method, mediator-displacement loop-mediated isothermal amplification (MD LAMP), offers quick and versatile diagnostics for emerging infectious diseases and antibiotic resistance.

Keywords:
DNA testingMRSAcarbon electrodepoint-of-carereal-time LAMPsignal-onsolid-phase probesuniversal electrochemical detection

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Area of Science:

  • Electrochemistry
  • Molecular Diagnostics
  • Infectious Disease Detection

Background:

  • Epidemic infections and antibiotic resistance necessitate rapid diagnostic test adoption.
  • Current molecular diagnostic tests require time-consuming adaptation for new targets.
  • Need for universal, rapidly adaptable diagnostic platforms.

Purpose of the Study:

  • To develop a novel, repurposable sensing electrode functionalization for rapid diagnostics.
  • To demonstrate a universal, target-independent oligonucleotide probe approach.
  • To enable rapid detection of pathogens and antibiotic resistance markers.

Main Methods:

  • Utilized mediator-displacement loop-mediated isothermal amplification (MD LAMP) for target amplification.
  • Employed a universal, target-independent oligonucleotide probe on sensing electrodes.
  • Functionalized low-cost carbon electrodes with carboxymethyl aniline modification for probe attachment.

Main Results:

  • Successfully detected *Staphylococcus aureus* and *Treponema pallidum* using the same probe.
  • Achieved limits of detection as low as 4 x 10^2 copies/reaction within 30 minutes.
  • Demonstrated broad applicability with real swab samples and commercial amplification buffers.

Conclusions:

  • The electrochemical MD LAMP assay is fast, compatible with dsDNA targets, and requires minimal adaptation.
  • Repurposable functionalized electrodes offer a versatile platform for various targets.
  • This approach enhances preparedness for future epidemic outbreaks and evolving resistance patterns.