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Hand-powered vacuum-driven microfluidic gradient generator for high-throughput antimicrobial susceptibility testing.

Wenyi Zeng1, Peng Chen1, Shunji Li1

  • 1The Key Laboratory for Biomedical Photonics of MOE at Wuhan National Laboratory for Optoelectronics - Hubei Bioinformatics & Molecular Imaging Key Laboratory, Systems Biology Theme, Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074, China.

Biosensors & Bioelectronics
|February 26, 2022
PubMed
Summary
This summary is machine-generated.

A novel hand-powered microfluidic device offers rapid antibiotic susceptibility testing (AST) in under 8 hours. This cost-effective, easy-to-use platform provides accurate minimum inhibitory concentration (MIC) results for point-of-care applications.

Keywords:
Antibiotic susceptibility testingGradient generatorHand-poweredHigh-throughputMinimum inhibitory concentrationVacuum

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Area of Science:

  • Microfluidics
  • Biotechnology
  • Antimicrobial Resistance

Background:

  • Antimicrobial resistance is a growing global health threat.
  • Conventional antibiotic susceptibility testing (AST) is time-consuming (18-24 hours).
  • Rapid AST is crucial for effective clinical treatment and preventing antimicrobial misuse.

Purpose of the Study:

  • To develop a rapid, user-friendly, and cost-efficient method for antibiotic susceptibility testing (AST).
  • To introduce a hand-powered vacuum-driven microfluidic (HVM) device for determining minimum inhibitory concentrations (MIC).
  • To validate the HVM device's performance against traditional AST methods.

Main Methods:

  • A hand-powered vacuum-driven microfluidic (HVM) device utilizing a syringe for antibiotic gradient generation.
  • Pre-assembly, lyophilization, and ready-to-use antibiotic-containing chambers.
  • Bacterial sample loading via suction and Alamar Blue for growth detection.
  • Parallel HVM device enabling simultaneous testing of eight antibiotic assays.

Main Results:

  • The HVM device achieved antibiotic susceptibility testing (AST) results in less than 8 hours.
  • MIC values determined using the HVM device were consistent with traditional methods for E. coli K-12.
  • The device demonstrated high-throughput capability and ease of use.

Conclusions:

  • The HVM device offers a rapid, cost-efficient, and user-friendly solution for antibiotic susceptibility testing (AST).
  • This platform is suitable for point-of-care testing (POCT) applications.
  • The technology has the potential to significantly improve antimicrobial stewardship and patient outcomes.