Velvet Disease Detection Device Using Recombinant Antibodies
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Solution Overview
Problem
Current diagnostic methods for velvet disease in aquaculture, caused by Amyloodinium and Piscinoodinium parasites, are inadequate for early detection, leading to rapid outbreaks and high mortality in fish, as they are subjective, costly, and often too late for effective treatment, and existing technologies are not suitable for in-situ use by aquaculture farmers.
Innovation Solution
A rapid diagnostic test (RDT) biosensor system using recombinant monoclonal antibodies (rmAbs) and other affinity reagents is developed to detect velvet disease antigens in water and fish samples, allowing for early identification of infectious life stages of the parasites, enabling timely intervention and control measures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional diagnostic methods are used for velvet disease detection, then the detection process is simple to perform, but the detection precision is low and results are obtained too late for effective treatment
Solution Approach 1:
The patent introduces affinity reagents (antibodies, aptamers, or other binding molecules) as intermediaries that specifically bind to velvet disease antigens. These reagents enable highly specific detection by mediating the interaction between the diagnostic device and the target pathogen, thereby improving detection precision while maintaining operational simplicity through standardized test formats.
Solution Approach 2:
The patent replaces traditional mechanical/microscopic examination methods with immunological or molecular binding-based detection systems. Instead of relying on visual inspection or complex laboratory equipment, the invention uses specific molecular interactions (antigen-antibody binding, aptamer-target binding) that can be detected through simpler means such as color changes, fluorescence, or lateral flow readouts.
2Productivity
If traditional diagnostic methods are used for velvet disease detection, then the device complexity is low, but the productivity of early detection is insufficient
Solution Approach 1:
The patent incorporates pre-coated affinity reagents on test strips or in test wells before sample application. This preliminary preparation allows for rapid detection without requiring complex sample processing steps during actual testing. The pre-prepared reagents are stable and ready-to-use, enabling quick detection while maintaining operational simplicity.
Solution Approach 2:
The patent employs disposable test strips or single-use test devices that integrate all necessary reagents and detection components in a compact format. These disposable units eliminate the need for complex, expensive, or reusable equipment requiring maintenance and calibration, thereby improving detection speed and accessibility while keeping device complexity low.
3Reliability
If traditional diagnostic methods are used for velvet disease detection, then the ease of operation is high, but the reliability of detection results is insufficient
Solution Approach 1:
The patent designs a universal detection platform that can detect multiple velvet disease antigens or related pathogens using the same basic test format and reagent type. This multi-functional approach improves reliability by enabling consistent detection across different samples and conditions, while maintaining ease of operation through standardized procedures that do not require operator expertise in multiple different techniques.
Solution Approach 2:
The patent utilizes colorimetric or fluorescent indicators that change color or emit light upon binding to velvet disease antigens. These visual changes provide clear, unambiguous results that are easy to interpret without requiring complex instrumentation or trained operators, thereby improving both reliability and ease of operation simultaneously.
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 RDT biosensor provides a rapid, cost-effective, and accurate means for early detection of velvet disease, preventing widespread infections and reducing economic losses by allowing for prompt treatment and control measures before significant mortality occurs.
Implementation Method 1
a test plate comprising a support bearing at least one conjugated (detection) affinity reagent and at least one immobilized (capture) affinity reagent that are cross-reactive with one or more AO or PP antigens
Implementation Method 2
the affinity reagents being bound to the support or bound to particles that can migrate along the support
Data Source
AI summary
Velvet disease infestation is detected using affinity reagents that are cross-reactive with one or more A. ocellatum or P. pillulare antigens. The analysis may be performed shipboard, dockside, in an aquaculture or aquarium setting, otherwise in situ at the point of sample collection or elsewhere. The results may be used to monitor health and disease of captured or cultured fish species or the safety of water to be introduced into an aquaculture facility.