CDV Detection Kit Using Isothermal Amplification and Gold Strips
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Solution Overview
Problem
Current methods for diagnosing canine distemper virus in giant pandas are inefficient, difficult to perform without specialized equipment, and lack sensitivity and specificity, posing a challenge for early detection and prevention of the virus spread.
Innovation Solution
A primer composition for multi-enzyme isothermal nucleic acid rapid amplification (MIRA) technology is developed, using specific primers for the conserved region of the CDV gene, combined with colloidal gold test strips for rapid and sensitive detection, allowing amplification at room temperature and providing results within 40 minutes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional diagnostic methods are used for canine distemper virus detection, then detection sensitivity and specificity are improved, but equipment complexity and operational difficulty increase
Solution Approach 1:
The patent replaces complex mechanical detection equipment with a colloidal gold test strip-based detection system. The MIRA amplification reaction is performed in a simple tube without requiring sophisticated instrumentation, and the final detection is achieved through visual interpretation of test strip color changes, eliminating the need for complex mechanical or electronic equipment while maintaining high detection sensitivity
Solution Approach 2:
The patent introduces colloidal gold test strips as an intermediary between the MIRA amplification reaction and final detection. The test strips capture and visually display the amplification results through color changes, serving as a simple yet effective mediator that translates molecular-level amplification events into easily observable signals without requiring complex equipment
2Measurement precision
If traditional diagnostic methods are used for canine distemper virus detection, then detection accuracy is improved, but time consumption increases
Solution Approach 1:
The patent performs nucleic acid extraction and MIRA amplification preparation in advance, with the amplification reaction designed to complete within 15 minutes. The reagents are pre-mixed and ready-to-use, eliminating time-consuming setup steps during actual detection, thereby achieving both high accuracy and rapid results
Solution Approach 2:
The patent uses the MIRA isothermal amplification method which rapidly amplifies target nucleic acid in just 15 minutes at constant temperature, skipping the multiple temperature cycling steps required by traditional PCR. This accelerated amplification process significantly reduces detection time while maintaining high detection accuracy
3Productivity
If specialized equipment is used for nucleic acid amplification, then amplification efficiency is improved, but ease of operation deteriorates
Solution Approach 1:
The patent changes the amplification parameter from temperature-cycling PCR to isothermal MIRA amplification that operates at a constant temperature of 37-42°C. This parameter change eliminates the need for complex thermal cycling equipment, allowing the reaction to proceed efficiently in simple water baths or incubators, thereby improving both amplification efficiency and ease of operation
Solution Approach 2:
The MIRA reaction system is designed to be self-sufficient, requiring only constant temperature maintenance without needing complex temperature programming or cycling controls. The reaction mixture contains all necessary enzymes and reagents that automatically perform the amplification function, making the system easy to operate with minimal technical expertise
4Speed
If rapid detection is implemented, then detection speed is improved, but detection precision deteriorates
Solution Approach 1:
The patent performs extensive optimization of primer sequences, probe designs, and reagent compositions in advance to ensure that the rapid 15-minute MIRA amplification produces sufficient and specific products. This preliminary optimization guarantees that even the shortened reaction time yields results with high precision that can be accurately detected by the colloidal gold test strips
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 method achieves rapid, sensitive, and specific detection of CDV with low equipment dependency, enabling early diagnosis and reducing virus spread, and can be adapted for various pathogens by designing primers for conserved genes.
Implementation Method 1
under the action of special enzymes, the target gene fragment may be amplified at room temperature and constant temperature
Implementation Method 2
MIRA technology needs short reaction duration, and the reaction starts as soon as the reagent is added to the system containing samples, and the amplification reaction is completed within 15 minutes
Implementation Method 3
detecting the amplified products with nucleic acid colloidal gold test strips
Implementation Method 4
nucleic acid colloidal gold test strips
Data Source
AI summary
A giant panda canine distemper virus detection kit based on multi-enzyme isothermal nucleic acid rapid amplification technology and a use method are provided. For CDV, the kit selects virus conserved gene, designs specific primers in the conserved region of the gene, amplifies the N gene fragment of CDV by multi-enzyme isothermal rapid amplification technology, and then detects the amplified products with nucleic acid colloidal gold test strips to establish a MIRA detection method for rapid auxiliary diagnosis with CD.