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Related Concept Videos

Raman Spectroscopy: Overview01:20

Raman Spectroscopy: Overview

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The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
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Related Experiment Video

Updated: Jan 17, 2026

Rapid Antimicrobial Susceptibility Testing by Stimulated Raman Scattering Imaging of Deuterium Incorporation in a Single Bacterium
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Single-Cell Antimicrobial Susceptibility Testing via Stimulus-Responsive Resonance Raman Scattering Imaging.

Wenshuai Li1,2, Leilei Yang1, Yongmei Yin3

  • 1State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, Shaanxi Key Laboratory of Agricultural and Environmental Microbiology, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, 712100, China.

Angewandte Chemie (International Ed. in English)
|September 19, 2025
PubMed
Summary

A new stimulus-responsive resonance Raman scattering (SRRRS) imaging technique rapidly detects antimicrobial resistance (AMR) in bacteria within hours. This method enables faster antibiotic susceptibility testing, improving patient outcomes for infections like Pseudomonas aeruginosa.

Keywords:
Antibiotic screeningAntimicrobial susceptibility testingReal‐time monitoringSingle‐cell levelsStimulus‐responsive resonance Raman scattering

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Area of Science:

  • Biomedical Engineering
  • Microbiology
  • Analytical Chemistry

Background:

  • Antimicrobial resistance (AMR) is a global health crisis.
  • Current antimicrobial susceptibility testing (AST) methods are slow, requiring days for bacterial culture.
  • Rapid AMR detection is crucial for effective antibiotic treatment.

Purpose of the Study:

  • To develop a rapid, single-cell level technique for AMR detection and antibiotic screening.
  • To enable real-time monitoring of bacterial response to antibiotics.
  • To establish a new tool for guiding timely antibiotic prescriptions.

Main Methods:

  • Development of a stimulus-responsive resonance Raman scattering (SRRRS) imaging technique.
  • Monitoring dynamic β-lactamase expression at the single-cell level.
  • Construction of an SRRRS-imaging-derived antibiotic breakpoints library for Pseudomonas aeruginosa (P. aeruginosa).

Main Results:

  • SRRRS imaging allows AMR detection and antibiotic screening within 2.5 hours.
  • The technique achieves a detection limit of 10^2 CFU mL^-1 for AMR bacteria, significantly lower than conventional probes.
  • Rapid susceptibility testing for 14 antibiotics against P. aeruginosa was achieved within 3 hours.
  • Clinical validation showed 93% accuracy in intensive care unit patients.

Conclusions:

  • SRRRS imaging offers a transformative tool for rapid AMR detection and antibiotic susceptibility testing.
  • This technique significantly reduces the time required for bacterial culture-based methods.
  • Clinical application of SRRRS imaging can improve antibiotic prescription guidance and patient outcomes in P. aeruginosa infections.