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Related Concept Videos

Automated Microbial Diagnostics01:24

Automated Microbial Diagnostics

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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Stress-induced Antibiotic Susceptibility Testing on a Chip
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Antimicrobial susceptibility testing using high surface-to-volume ratio microchannels.

Chia Hsiang Chen1, Yi Lu, Mandy L Y Sin

  • 1Department of Aerospace and Mechanical Engineering, P.O. Box 210119, University of Arizona, 1703 East Mabel Street, Tucson, Arizona 85721, USA.

Analytical Chemistry
|January 9, 2010
PubMed
Summary

This study introduces microfluidics for rapid point-of-care antimicrobial susceptibility testing. Microfluidic devices enable fast bacterial growth and resistance pattern determination in just 2 hours.

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Area of Science:

  • Biomedical Engineering
  • Microfluidics
  • Clinical Diagnostics

Background:

  • Antimicrobial susceptibility testing (AST) is crucial for guiding treatment decisions.
  • Current AST methods are time-consuming, delaying appropriate patient care.
  • Point-of-care diagnostics are needed for rapid clinical decision-making.

Purpose of the Study:

  • To develop a microfluidic platform for rapid antimicrobial susceptibility testing (AST) at the point of care.
  • To leverage the high surface-to-volume ratio of microfluidics for accelerated bacterial growth.
  • To demonstrate the feasibility of rapid AST using clinical isolates in various media.

Main Methods:

  • Utilized gas-permeable polymeric microfluidic channels of varying dimensions.
  • Observed the growth of uropathogenic Escherichia coli (E. coli).
  • Tested microfluidic AST with clinical bacterial isolates in culture media and urine.

Main Results:

  • Microfluidic systems with channel depths ≤250 micrometers supported rapid E. coli growth (>10^9 CFU/mL) without external oxygenation.
  • Demonstrated effective oxygenation due to the large surface-to-volume ratio inherent in microfluidics.
  • Achieved determination of antimicrobial resistance patterns in as little as 2 hours.

Conclusions:

  • Microfluidic platforms enable rapid bacterial growth and AST at the point of care.
  • The technology significantly reduces the time for determining antimicrobial resistance patterns compared to standard methods.
  • This advancement facilitates faster diagnostics and potentially improves patient outcomes.