Deuterium uptake in combination with Raman spectroscopy as a tool to investigate antibiotic susceptibility of bacteria

D. Bauer; L. Qiu; K. Wieland; A.-C. Neumann-Cip; A. Wieser; G. Magistro; C. Stief; C. Haisch

doi:10.1117/12.2553093

28 February 2020 Deuterium uptake in combination with Raman spectroscopy as a tool to investigate antibiotic susceptibility of bacteria

D. Bauer, L. Qiu, K. Wieland, A.-C. Neumann-Cip, A. Wieser, G. Magistro, C. Stief, C. Haisch

Author Affiliations +

Proceedings Volume 11223, Photonic Diagnosis, Monitoring, Prevention, and Treatment of Infections and Inflammatory Diseases 2020; 1122302 (2020) https://doi.org/10.1117/12.2553093
Event: SPIE BiOS, 2020, San Francisco, California, United States

Abstract

The evolution of multi-resistant bacteria poses a major threat to our healthcare system worldwide. To address this serious public health issue, the speed and sensitivity of state-of-the-art antibiotic susceptibility testing (AST) such as broth dilution and disc diffusion methods need to be significantly improved to provide better patient care. With the ultimate goal of developing a fast and reliable alternative that outperforms current state-of-the-art procedures, a high-throughput, generally– in terms of bug drug combinations – applicable analytical protocol was developed employing Raman spectroscopy as non-destructive analysis tool to monitor the deuterium uptake of metabolically active bacteria and additionally extract chemical-specific information for bacteria and/or contaminant identification. Our AST is based on two reference strains representing Gram-negative (E. coli) and Gram-positive bacteria (E. faecalis), treated with a total of four different antibiotics. Apart from high sensitivity and specificity, time is the most crucial parameter in clinical diagnosis. Hence, bulk analysis of highly concentrated samples was favored over a single-cell approach to allow timeefficient, straight-forward sample preparation and investigation. The developed AST also comprises a preincubation step (bug-drug incubation prior to the addition of D2O containing medium) which is shown to be key for the development of a reliable test comprising Gram-positive and Gram-negative bacteria. 52 clinical isolates typical for urinary tract infection causing pathogens were investigated in a semi-automated setting showing good agreement with state-of-the-art analytics.

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D. Bauer, L. Qiu, K. Wieland, A.-C. Neumann-Cip, A. Wieser, G. Magistro, C. Stief, and C. Haisch "Deuterium uptake in combination with Raman spectroscopy as a tool to investigate antibiotic susceptibility of bacteria", Proc. SPIE 11223, Photonic Diagnosis, Monitoring, Prevention, and Treatment of Infections and Inflammatory Diseases 2020, 1122302 (28 February 2020); https://doi.org/10.1117/12.2553093

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