Interference Disturbance Analysis Enables Single-Cell Level Growth and Mobility Characterization for Rapid Antimicrobial Susceptibility Testing
| Autor: | Konstantin J Ditzel, Joachim O. Rädler, Madeleine Opitz, Valentin Stierle, Philipp Paulitschke, David Volbers, Julian Aschauer |
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| Rok vydání: | 2018 |
| Předmět: |
Diffraction
Time Factors Bioengineering Microbial Sensitivity Tests 02 engineering and technology Bacterial growth Interference (wave propagation) Bacterial cell structure Minimum inhibitory concentration Cell Mobility Escherichia coli Humans General Materials Science Escherichia coli Infections Bacteria Chemistry Mechanical Engineering Bacterial Infections Equipment Design General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Antimicrobial Anti-Bacterial Agents Intensity (physics) Biophysics Single-Cell Analysis 0210 nano-technology |
| Zdroj: | Nano Letters. 19:643-651 |
| ISSN: | 1530-6992 1530-6984 |
| Popis: | To support the emerging battle against antimicrobial resistance (AMR), detection methods that allow fast and accurate antimicrobial susceptibility testing (AST) are urgently needed. The early identification and application of an appropriate antibiotic treatment leads to lower mortality rates and substantial cost savings and prevents the development of resistant pathogens. In this work, we present a diffraction-based method, which is capable of quantitative bacterial growth, mobility, and susceptibility measurements. The method is based on the temporal analysis of the intensity of a light diffraction peak, which arises due to interference at a periodic pattern of gold nanostructures. The presence of bacteria disturbs the constructive interference, leading to an intensity decrease and thus allows the monitoring of bacterial growth in very low volumes. We demonstrate the direct correlation of the decrease in diffraction peak intensity with bacterial cell number starting from single cells and show the capability for rapid high-throughput AST measurements by determining the minimum inhibitory concentration for three different antimicrobials in less than 2-3 h as well as the susceptibility in less than 30-40 min. Furthermore, bacterial mobility is obtained from short-term fluctuations of the diffraction peak intensity and is shown to decrease by a factor of 3 during bacterial attachment to a surface. This multiparameter detection method allows for rapid AST of planktonic and of biofilm-forming bacterial strains in low volumes and in real-time without the need of high initial cell numbers. |
| Databáze: | OpenAIRE |
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