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Antibiotic Selection00:57

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Related Experiment Video

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Integrated Dual-Modality Biosensor for Antimicrobial Susceptibility Testing and Antibiotic Prescription Guidance.

Lin-Yan Lu1,2, Yi-Ming Zheng1,2, Jie-Wei Huang3

  • 1Quanzhou Clinical Medication Management Quality Control Center, Department of Pharmacy, Affiliated Quanzhou First Hospital of Fujian Medical University, Quanzhou 362000, China.

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A new dual-mode biosensor accurately detects antimicrobial resistance (AMR) by measuring bacterial catalase activity. This rapid antimicrobial susceptibility testing (AST) method improves diagnostic accuracy for guiding antibiotic prescriptions.

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Area of Science:

  • Biomedical Engineering
  • Analytical Chemistry
  • Microbiology

Background:

  • Antimicrobial resistance (AMR) poses a significant global health threat.
  • Rapid antimicrobial susceptibility testing (AST) is crucial for effective diagnosis and treatment.
  • Existing fluorescence and colorimetric sensors for AST can produce false signals.

Purpose of the Study:

  • To develop a precise and reliable AST method by overcoming limitations of single-mode sensors.
  • To enhance diagnostic accuracy through the fusion of dual-mode detection features.
  • To create a biosensor platform for guiding clinical decision-making in antibiotic prescriptions.

Main Methods:

  • Development of a dual-modality integrated fluorescence/colorimetric biosensor.
  • Utilized bovine serum albumin-modified gold nanoclusters (BSA-AuNCs) as a bifunctional sensor.
  • Assessed bacterial catalase activity post-antibiotic exposure, monitoring hydrogen peroxide (H2O2) response.

Main Results:

  • The integrated dual-modality biosensor accurately determined antibiotic susceptibilities for *Escherichia coli*, *Klebsiella pneumoniae*, and *Staphylococcus aureus*.
  • Achieved high diagnostic performance with Area Under the Curve (AUC) values ranging from 0.9881 to 1.
  • Demonstrated improved accuracy and reliability compared to single-mode detection methods.

Conclusions:

  • The developed dual-signal readout biosensor offers a precise and reliable platform for AST.
  • This method effectively addresses the need for improved diagnostic accuracy in combating AMR.
  • The biosensor has the potential to guide clinical antibiotic prescriptions, optimizing patient care.