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Related Concept Videos

Microbial Biosensors01:17

Microbial Biosensors

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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

Updated: Apr 29, 2026

Combination of Adhesive-tape-based Sampling and Fluorescence in situ Hybridization for Rapid Detection of Salmonella on Fresh Produce
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A pipette-adapted biosensor for Salmonella detection.

Lei Wang1, Wuzhen Qi1, Maohua Wang1

  • 1Key Laboratory of Agricultural Information Acquisition Technology, Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing, China.

Biosensors & Bioelectronics
|October 8, 2022
PubMed
Summary
This summary is machine-generated.

A novel pipette-based biosensor enables rapid, in-field detection of Salmonella typhimurium. This affordable, equipment-free device offers sensitive and specific foodborne pathogen screening, crucial for preventing food poisoning.

Keywords:
BiosensorGold@platinum nanocatalystMagnetic nanobeadPipetteSalmonella

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Area of Science:

  • Analytical Chemistry
  • Biosensor Technology
  • Food Safety Science

Background:

  • In-field screening of pathogenic bacteria is critical for preventing foodborne illnesses.
  • Existing methods for detecting foodborne pathogens can be time-consuming and require specialized laboratory equipment.

Purpose of the Study:

  • To develop a portable, pipette-adapted biosensor for the rapid, in-field detection of Salmonella typhimurium.
  • To create a user-friendly, affordable, and equipment-free method for foodborne pathogen analysis.

Main Methods:

  • Utilized a common pipette adapted for multiple functions: mixing, magnetic separation, nanocatalyst labeling, and detection.
  • Employed immune magnetic nanobeads for capturing bacteria and immune gold@platinum nanocatalysts for signal amplification.
  • Quantified bacterial presence by measuring pressure changes resulting from catalytic oxygen production.

Main Results:

  • Achieved rapid detection of Salmonella typhimurium within 90 minutes.
  • Established a low limit of detection at 180 CFU/mL.
  • Demonstrated the biosensor's sensitivity, specificity, and robustness.

Conclusions:

  • The developed pipette-adapted biosensor is a promising tool for in-field foodborne pathogen testing.
  • Its ASSURED (Affordable, Sensitive, Specific, User-friendly, Rapid, Equipment-free, Deliverable) characteristics make it suitable for resource-constrained settings.
  • This technology has significant potential to enhance food safety and prevent food poisoning outbreaks.