Real-Time Respiration Changes as a Viability Indicator for Rapid Antibiotic Susceptibility Testing in a Microfluidic Chamber Array
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Date
2021-06-25
Publication Type
Journal Article
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Abstract
Rapid identification of a pathogen and the measurement of its antibiotic susceptibility are key elements in the diagnostic process of bacterial infections. Microfluidic technologies offer great control over handling and manipulation of low sample volumes with the possibility to study microbial cultures on the single-cell level. Downscaling the dimensions of cultivation systems directly results in a lower number of bacteria required for antibiotic susceptibility testing (AST) and thus in a reduction of the time to result. The developed platform presented in this work allows the reading of pathogen resistance profiles within 2–3 h based on the changes of dissolved oxygen levels during bacterial cultivation. The platform contains hundreds of individual growth chambers prefilled with a hydrogel containing oxygen-sensing nanoprobes and different concentrations of antibiotic compounds. The performance of the developed platform is tested using quality control Escherichia coli strains (ATCC 25922 and ATCC 35218) in response to clinically relevant antibiotics. The results are in agreement with values given in reference guidelines and independent measurements using a clinical AST protocol. Finally, the platform is successfully used for the AST of an E. coli clinical isolate obtained from a patient blood culture.
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published
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Journal / series
Volume
6 (6)
Pages / Article No.
2202 - 2210
Publisher
American Chemical Society
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Edition / version
Methods
Software
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Date collected
Date created
Subject
antibiotic susceptibility testing; bacterial resistance; microfluidics; minimal inhibitory concentration; oxygen-sensing nanoprobes
Organisational unit
03602 - Panke, Sven / Panke, Sven
03807 - Dittrich, Petra S. / Dittrich, Petra S.
Notes
Funding
167123 - Microfluidic device for ultrarapid phenotypic susceptibility testing of pathogenic microbes (SNF)
681587 - Engineering of hybrid cells using lab-on-chip technology (EC)
681587 - Engineering of hybrid cells using lab-on-chip technology (EC)