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Yusuf T. Tamer

at Univ of Texas Southwestern Medical Ctr at Dallas

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Proceedings Article | 9 March 2020 Open Access

A rapid and highly sensitive optical platform for pathogen detection and antimicrobial sensitivity testing (Conference Presentation)

Mehmet Cansizoglu, Yusuf Tamer, Michael Farid, Andrew Koh, Erdal Toprak

Proceedings Volume 11233, 112330V (2020) https://doi.org/10.1117/12.2554834

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Antibiotic resistance is a burgeoning global public health threats of our time. Antibiotic resistance is a multifactorial and complex problem which cannot be solved by only developing stronger and better antibiotic compounds. Rapid detection and characterization of pathogenic bacteria are critical for effectively treating bacterial infections without exacerbating the resistance problem. Here, we present a novel highly-sensitive and label-free platform, Rapid-Ultra-Sensitive-Detector (RUSD), that utilizes the high reflectance coefficient of light at the interface between low-refractive-index and high-refractive-index media. The sensitivity of RUSD is three to four orders of magnitude higher than conventional optical density-based methods. Utilizing RUSD, we can detect as low as ~20 bacterial cells or a single fungal cell. This technique does not require any sophisticated signal processing steps and it enables growth rate measurements in less than an hour. Finally, we can now measure antibiotics resistance of several gram-negative and gram-positive bacteria, including Staphylococcus aureus, Pseudomonas aeruginosa, and Escherichia coli, within two hours.

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