Magnetic Particle Analyte Detection System
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Solution Overview
Problem
Current methods for detecting pathogenic organisms in food and water require expensive and complex Bio safety Level 2 facilities, limiting rapid and efficient detection, especially for trace levels of pathogens like Listeria monocytogenes, E. coli, and viruses such as influenza A and Norovirus.
Innovation Solution
A system and method using a reservoir with a sterile growth medium containing isolation particles and signaling entities that allow for the growth, isolation, and monitoring of pathogenic analytes without the need for BSL2 protocols, utilizing magnetic particles and optical signaling for detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If BSL2 facilities and protocols are used for pathogen detection, then detection reliability and safety are improved, but device complexity and operational cost increase significantly
Solution Approach 1:
The system divides the pathogen detection process into separate functional modules: a sealed reservoir containing growth medium and pathogens, magnetic particles for isolation, and optical detection components. This segmentation allows each module to be optimized independently while maintaining overall safety and reliability without requiring complex BSL2 facilities.
Solution Approach 2:
Magnetic particles serve as intermediaries between the pathogen-containing growth medium and the detection system. These particles bind to pathogens, enabling their isolation and detection through magnetic separation and optical signaling without direct handling of live pathogens, thereby eliminating the need for BSL2 containment.
2Object-affected harmful factors
If BSL2 facilities are used for pathogen detection, then safety is improved, but ease of operation deteriorates due to restricted access and complex protocols
Solution Approach 1:
A sealed flexible reservoir membrane contains the pathogen and growth medium, providing physical containment without requiring rigid BSL2 facility infrastructure. The membrane allows the system to be handled and operated like a simple container while maintaining biosafety containment.
Solution Approach 2:
The system performs self-containment through the sealed reservoir design, where the membrane itself provides the containment function rather than requiring external BSL2 facility infrastructure. This eliminates the need for specialized facility access and complex safety protocols.
3Reliability
If conventional detection methods are used, then detection capability is achieved, but loss of time increases due to lengthy processing procedures
Solution Approach 1:
The system maintains continuous detection capability through real-time optical monitoring of the growth medium. As pathogens grow and interact with magnetic particles, the optical signal changes continuously, allowing for rapid detection without interrupting the process for sample transfer or reprocessing.
Solution Approach 2:
The system replaces mechanical manipulation steps (pipetting, centrifugation, plating) with magnetic field-based particle manipulation and optical detection. This substitution eliminates time-consuming mechanical operations while maintaining detection accuracy.
4Measurement precision
If trace level pathogen detection is performed, then measurement precision is improved, but device complexity increases due to sensitivity requirements
Solution Approach 1:
The system uses optical signal changes (color/fluorescence intensity variations) to detect trace levels of pathogens. As magnetic particles bound to pathogens are concentrated by the magnetic field, they produce measurable optical signal changes that indicate pathogen presence at trace levels without requiring complex instrumentation.
Solution Approach 2:
The detection system uses composite magnetic particles that combine magnetic properties for manipulation with optical properties for detection. This composite structure enables simultaneous magnetic separation and optical signaling, achieving trace level detection sensitivity through material design rather than system complexity.
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
Enables rapid, cost-effective, and simultaneous detection of pathogenic organisms at trace levels without the need for BSL2 facilities, allowing for on-site testing and improved food safety.
Implementation Method 1
a source of magnetic field configured to draw magnetic particles proximate the detection region
Implementation Method 2
a source of excitation energy positioned to expose the detection region to the excitation energy, and a detector positioned to detect a signal emitted in the detection region
Data Source
AI summary
Particle-based detection of analytes including, for example, systems, kits, and methods for growth, isolation, and/or monitoring of analytes are generally disclosed. In some embodiments, the systems and methods described herein are generally directed to the capture and/or concentrating of a target species (e.g., analyte) to be detected and/or monitored. In some embodiments, the materials, systems, and methods described herein may be used to create luminescent signals in response to the presence of selected analytes such as bacteria, viruses, and parasites. In some cases, the target analyte is a pathogenic bacteria, a pathogenic virus, a pathogenic parasite, or toxin.