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Related Concept Videos

Antibiotic Selection00:57

Antibiotic Selection

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Overview
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Related Experiment Video

Updated: Jun 29, 2025

Design and Use of a Low Cost, Automated Morbidostat for Adaptive Evolution of Bacteria Under Antibiotic Drug Selection
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Rapid Phenotypic Antibiotics Susceptibility Analysis by a 3D Printed Prototype.

Oliver Riester1,2, Lars Kaiser1, Stefan Laufer2,3,4

  • 1Institute of Precision Medicine, Furtwangen University, Jakob-Kienzle-Strasse 17, 78054, Villingen-Schwenningen, Germany.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|March 26, 2024
PubMed
Summary

A new electrochemical antibiotic susceptibility testing (AST) method provides results in 5-10 hours, significantly faster than the standard 48-hour method. This rapid AST helps clinicians choose effective antibiotics sooner, combating antibiotic resistance.

Keywords:
3D printerantibiotic resistancesantibiotic susceptibility testingno preculturephenotypicscreen printed electrodes

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Area of Science:

  • Clinical microbiology
  • Biomedical engineering
  • Public health

Background:

  • Antibiotic-resistant pathogens pose a major public health threat, necessitating efficient antibiotic use.
  • Current phenotypic antibiotic susceptibility testing (AST) methods take over 48 hours, leading to delayed treatment and broad-spectrum antibiotic use.

Purpose of the Study:

  • To develop and validate a rapid phenotypic electrochemical AST method for identifying effective antibiotics.
  • To reduce the turnaround time for AST results to aid timely clinical decision-making.

Main Methods:

  • A phenotypic electrochemical AST method was developed, utilizing direct loading of diluted serum samples.
  • The method was tested with spiked serum samples containing clinically relevant pathogens (e.g., E. coli, S. aureus).
  • Electrochemical measurements combined with computational analysis were employed for online and offline use.

Main Results:

  • The electrochemical AST method achieved a turnaround time of 5-10 hours.
  • The method demonstrated high accuracy with a sensitivity of 94.44% and specificity of 95.83% on individual replicates.
  • Direct sample loading eliminated the need for pre-culture steps.

Conclusions:

  • This rapid electrochemical AST method offers a significant improvement over conventional methods.
  • Faster AST results can facilitate more targeted antibiotic therapy, crucial for combating antimicrobial resistance.
  • The method's accuracy and efficiency support its potential clinical application in bloodstream infection management.