Polydiacetylene Hydrogel Biosensor for Rapid Antibiotic Susceptibility Testing
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Solution Overview
Problem
Conventional antibiotic susceptibility testing methods, such as disk diffusion and broth dilution techniques, are time-consuming and labor-intensive, requiring several days for bacterial culturing and turbidity measurement, which limits their efficiency in real-time measurement and sensitivity.
Innovation Solution
A colorimetric biosensor comprising a porous hydrogel structure formed of polydiacetylene and a hydrogel polymer, combined with a microbial nutrient source, which detects microorganisms through color change, allowing for real-time measurement and enhanced sensitivity in antibiotic susceptibility testing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional antibiotic susceptibility testing methods (disk diffusion or broth dilution) are used, then reliable antibiotic susceptibility results can be obtained, but the testing process takes several days and requires significant labor
Solution Approach 1:
The invention extracts and isolates the essential function of bacterial detection from the complex multi-day culturing process. By using a colorimetric biosensor that directly detects bacterial presence and antibiotic susceptibility through color change, the method removes the time-consuming steps of extended culturing and manual turbidity measurement, achieving rapid results within hours while maintaining detection accuracy
Solution Approach 2:
The invention replaces the mechanical/manual processes of conventional testing (manual culturing, identification, and turbidity measurement) with an optical detection system. The colorimetric biosensor uses optical properties (color change) to automatically indicate antibiotic susceptibility, eliminating the need for labor-intensive manual operations and extending the incubation period
2Measurement precision
If conventional antibiotic susceptibility testing methods are used, then comprehensive bacterial identification can be achieved, but the process requires significant labor and complex procedures
Solution Approach 1:
The invention employs color changes as a direct visual indicator of bacterial presence and antibiotic susceptibility. The colorimetric biosensor changes color in response to bacterial metabolism and antibiotic effects, providing immediate and unambiguous results without requiring complex identification procedures or specialized equipment, thereby greatly simplifying the operational process while maintaining identification accuracy
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The biosensor enables rapid detection of microorganism presence and growth rate through color change, reducing testing time and labor, and effectively differentiates between antibiotic susceptibility and resistance, facilitating timely and accurate antibiotic selection.
Implementation Method 1
it is known that polydiacetylene does not require the use of an additional catalyst or initiator and changes color to blue by UV stimulation, but changes color to red by external physical, chemical, and biological stimulation
Implementation Method 2
a colorimetric biosensor including a porous hydrogel structure including polydiacetylene and a hydrogel polymer (alginate, PEG-DA, etc.); and a microbial nutrient source
Data Source
AI summary
The present invention relates to a colorimetric biosensor, preparation method thereof, and antibiotic susceptibility testing method using the same, and more specifically, in the present invention, it is possible to prepare a colorimetric biosensor comprising a porous hydrogel structure including polydiacetylene and a hydrogel polymer (alginate, PEG-DA, etc.); and a microbial nutrient source, and it may be applied to a colorimetric biosensor for detecting microorganisms or a method for testing antibiotic susceptibility of microorganisms for allowing in real-time measurement and exhibiting excellent sensitivity using the colorimetric biosensor.