Dormant Bacteriophage Detection in Resource-Limited Settings
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current diagnostic technologies are unsuitable for resource-limited environments due to requirements for advanced infrastructure, equipment, and complex procedures, making it difficult to detect substances in areas lacking laboratory facilities and resources.
Innovation Solution
A portable culture device and method using dormant bacteriophage with a reporter gene and truncated coat protein, which becomes infective upon binding to a substance of interest, allowing for simple and effective detection of analytes in a biological sample without the need for advanced equipment or infrastructure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional diagnostic assays are used, then detection capability is improved, but device complexity and infrastructure requirements worsen
Solution Approach 1:
The patent extracts and eliminates complex infrastructure requirements (refrigeration, incubation, electronic components) while maintaining detection capability through a simplified phage-based assay system that can be performed in basic laboratory settings
Solution Approach 2:
The patent employs disposable microplate formats and pre-formed phage libraries that can be stored at room temperature, eliminating the need for expensive, complex, and maintenance-intensive diagnostic equipment while maintaining reliable detection
2Measurement precision
If conventional diagnostic assays are used, then detection precision is improved, but ease of manufacture worsens
Solution Approach 1:
The patent segments the diagnostic system into modular components: pre-assembled phage libraries displaying specific antigens, separate microplate formats for different analytes, and standardized reading protocols, making each component easy to manufacture and store while maintaining overall detection precision
Solution Approach 2:
The patent performs preliminary actions by pre-assembling phage libraries with specific antigen displays and pre-forming microplate formats before shipment, so that no complex manufacturing or assembly is needed at the point-of-use location, only simple mixing and reading operations
3Reliability
If conventional diagnostic assays are used, then reliability is improved, but loss of time worsens
Solution Approach 1:
The patent changes critical parameters including using phage libraries that can be stored at room temperature (eliminating refrigeration time), employing rapid phage display formats that complete binding assays within minutes, and using detection methods that provide immediate results without extended incubation periods
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 reliable and cost-effective detection of substances in resource-limited settings, facilitating point-of-care diagnostics by utilizing easily producible and stable components, such as paper and adhesive tape, to support bacterial growth and phage infection, thereby overcoming the limitations of existing diagnostic assays.
Implementation Method 1
a soluble N-terminal fragment of a phage coat protein... where the truncated coat protein displays a first binding ligand for the substrate of interest
Implementation Method 2
wherein formation of the complex activates the dormant bacteriophage to become infective
Implementation Method 3
Since the phage remains infective it can inject its DNA into bacterial cells and is amplified
Data Source
AI summary
The present invention provides a binding assay that employs an activatable dormant bacteriophage carrying a reporter gene to qualitatively or quantitatively detect the presence of a substance of interest in a sample. Also provided is a simple culture device that is designed for manufacture and use in areas of limited resources. The device is useful for cell culture in such environments with limited resources because cells grow in paper just as they do in a culture dish.