Multiplex rRT-PCR Assay for Differential Arbovirus Detection
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Solution Overview
Problem
Current methods lack a reliable and differential detection system for Zika, dengue, chikungunya, and West Nile viruses, which present with similar clinical symptoms, making accurate diagnosis challenging.
Innovation Solution
A multiplex one-step reverse transcription real-time polymerase chain reaction (rRT-PCR) assay, known as CII-ArboPlex rRT-PCR, using specific primers and probes designed to detect and differentiate between these viruses in serum and urine samples, allowing for simultaneous detection and identification in a single sample.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate detection methods are used for each virus, then detection specificity is improved, but device complexity and time consumption increase
Solution Approach 1:
The patent combines detection of four different arboviruses (Zika, dengue, chikungunya, and West Nile) into a single multiplex rRT-PCR assay. Multiple virus-specific primer and probe sets are combined in one reaction mixture, allowing simultaneous detection of all four viruses in a single test, thereby reducing assay complexity and time while maintaining detection specificity through virus-specific oligonucleotide sequences
Solution Approach 2:
The invention creates a universal detection platform that can identify multiple virus types using a common assay framework. The multiplex rRT-PCR system uses a standardized reaction protocol and detection methodology that can simultaneously target different viruses, making the system multi-functional rather than requiring separate specialized assays for each virus
2Measurement precision
If multiple separate assays are performed for differential diagnosis, then detection accuracy is improved, but loss of time increases
Solution Approach 1:
The patent merges four separate virus detection assays into one multiplex reaction that simultaneously amplifies and detects all four arboviruses. The use of fluorophore-labeled probes with distinct emission wavelengths allows parallel detection of multiple viruses in a single reaction well, eliminating the need to perform sequential assays and significantly reducing diagnosis time while maintaining the ability to differentiate between viruses
Solution Approach 2:
The multiplex assay enables continuous detection of multiple viruses simultaneously through real-time monitoring of fluorescence signals during the PCR amplification process. All four viruses are detected in one continuous reaction without interruption, allowing rapid differential diagnosis in a single testing step rather than requiring multiple separate testing steps
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 CII-ArboPlex rRT-PCR assay provides rapid, sensitive, and specific detection of Zika, dengue, chikungunya, and West Nile viruses, enabling accurate diagnosis and differentiation within a single assay, facilitating timely clinical interventions.
Implementation Method 1
A multiplex one-step reverse transcription real-time polymerase chain reaction (rRT-PCR) assay
Implementation Method 2
real-time polymerase chain reaction (rRT-PCR) assay
Implementation Method 3
amplifying the nucleic acid of the viruses in the presence of a detectably-labeled oligonucleotide probe
Data Source
AI summary
This invention relates to compositions and methods for the differential detection of multiple viruses using a one-step assay. The viruses to be detected include Zika, West Nile, dengue (genotype 1-4) and chikungunya viruses. In particular, the invention relates to a method of and assay for differential detection of the viruses using specific primers and probes designed to detect and differentiate between the viruses.