Related Experiment Video
Updated: Jan 17, 2026
Rapid Antimicrobial Susceptibility Testing by Stimulated Raman Scattering Imaging of Deuterium Incorporation in a Single Bacterium
Published on: February 14, 2022
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.
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.
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.
