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Related Concept Videos

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The cultivation of environmental microorganisms has long been hindered by the inability to replicate complex native conditions in vitro. The isolation chip (iChip) addresses this limitation by facilitating the growth of previously uncultivable microorganisms through in situ incubation. Designed for high-throughput microbial cultivation, the iChip comprises hundreds of microchambers, each capable of housing a single microbial cell. These microchambers are loaded with a mixture of molten agar and...
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Automated diagnostic analyzers have transformed clinical microbiology by providing rapid and reliable methods for pathogen identification and antibiotic susceptibility testing. Among these systems, the Vitek 2 is widely used because it automates the traditionally labor-intensive processes of microbial identification (ID) and antibiotic susceptibility testing (AST), delivering standardized and timely results that are essential for effective patient care.Microbial Identification with ID CardsThe...
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Updated: May 1, 2026

A Microfluidic Chip for the Versatile Chemical Analysis of Single Cells
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Standalone self-compartmentalizing microfluidic chip for digital single-cell antimicrobial susceptibility testing.

Siwat Jakaratanopas1, Baobao Lin1, Norased Nasongkla2

  • 1School of Biomedical Engineering, Tsinghua University, Beijing 100084, China.

Journal of Pharmaceutical and Biomedical Analysis
|October 10, 2025
PubMed
Summary

Researchers developed a rapid, user-friendly digital antimicrobial susceptibility testing (AST) method. This novel approach uses microfluidic picochambers for single-cell analysis, enabling quick bacterial drug resistance determination without specialized equipment.

Keywords:
DiagnosticsMicrofluidic DevicePhenotypic antimicrobial susceptibility testingPicoliter chamber arraySingle-cell analysis

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Area of Science:

  • Microfluidics
  • Bacteriology
  • Diagnostic Technology

Background:

  • Antibiotic resistance poses a significant global health threat.
  • Current antimicrobial susceptibility testing (AST) methods can be slow and require specialized infrastructure.
  • There is a need for rapid, accessible, and high-resolution AST solutions.

Purpose of the Study:

  • To develop a novel digital cell-based AST method.
  • To achieve rapid phenotypic AST at single-cell resolution.
  • To create a user-friendly and scalable diagnostic tool.

Main Methods:

  • Utilized a passive microfluidic picochamber array for stochastic cell confinement.
  • Employed resazurin-based fluorescence detection for quantifying bacterial growth.
  • Integrated capillary burst valves for autonomous fluid handling and sample partitioning.
  • Quantified viable bacterial concentrations and determined gentamicin minimum inhibitory concentration (MIC) breakpoints.

Main Results:

  • Demonstrated a streamlined workflow for rapid phenotypic AST.
  • Achieved single-cell resolution in bacterial growth and drug susceptibility analysis.
  • Quantified bacterial concentrations and determined MIC breakpoints within 4 hours.
  • Attained 100% categorical agreement with standard AST for ten clinical isolates.

Conclusions:

  • The developed microfluidic picochamber array offers a user-friendly and rapid digital AST approach.
  • This method enables accurate phenotypic AST at single-cell resolution without specialized equipment.
  • The technology shows promise for clinical diagnostics and applications in resource-limited settings.