Species-Specific TBRF Antigen Sequences for Rapid Serologic Detection
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Solution Overview
Problem
Current methods for diagnosing Tick-Borne Relapsing Fever (TBRF) are delayed, insensitive, and lack specificity, often requiring 24-hour culture of blood samples and achieving only 70% positive identification early in the disease.
Innovation Solution
Development of antigen-specific amino acid sequences, such as SEQ ID NO: 1-11, for use in diagnostic assays like immunoblots and ELISA to detect TBRF Borrelia species antibodies with high sensitivity and specificity, allowing for rapid identification of TBRF.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If blood culture method is used for TBRF diagnosis, then identification can be made, but assay time is delayed and sensitivity is reduced
Solution Approach 1:
The patent extracts and utilizes specific amino acid sequences (SEQ ID NOs: 1-11) from TBRF Borrelia species that are highly immunogenic and species-specific. These extracted sequences are used as targets in immunoassays, replacing the need for lengthy blood culture while maintaining or improving diagnostic sensitivity. The extraction of key antigenic regions enables direct detection without requiring full organism culture.
Solution Approach 2:
The patent introduces labeled amino acid sequences as intermediaries in the detection process. These labeled sequences serve as mediators that bind specifically to antibodies against TBRF Borrelia, enabling direct detection in patient samples. This intermediary approach allows for rapid identification without the time-consuming blood culture step, while the labeling enables sensitive detection through various detection methods.
2Measurement precision
If blood culture method is used for TBRF diagnosis, then identification can be made, but diagnosis specificity is reduced
Solution Approach 1:
The patent extracts species-specific amino acid sequences from multiple TBRF Borrelia species (B. hermsii, B. turicatae, B. miyamotoi, B. duttonii, B. parkeri) that exhibit high diagnostic specificity. These extracted sequences are designed to distinguish between different Borrelia species and between TBRF and Lyme disease, enabling specific identification without the cross-reactivity problems that can occur with whole-organism culture methods.
Solution Approach 2:
The patent applies local quality by using different amino acid sequences for detecting different TBRF species. Each amino acid sequence (SEQ ID NOs: 1-11) is selected for its species-specific characteristics, allowing the assay to provide both broad TBRF detection and specific species identification. This localized specificity at the sequence level enables accurate differentiation without requiring separate culture procedures for each species.
3Measurement precision
If existing diagnostic methods are used, then TBRF spirochetes can be identified, but detection sensitivity is low especially in early disease stages
Solution Approach 1:
The patent introduces labeled amino acid sequences as highly sensitive intermediaries for antibody detection. These labeled sequences enable direct detection of TBRF-specific antibodies in patient serum or plasma with high sensitivity, even in early disease stages when antibody levels may be low. The labeling allows for amplification and detection through various methods (fluorescence, chemiluminescence, etc.), significantly improving sensitivity over direct spirochete visualization.
Solution Approach 2:
The patent changes the detection parameter from direct visualization of spirochetes (which requires high bacterial load) to detection of antibody-antigen binding (which can detect lower levels of specific immunity). This parameter change from morphological detection to immunological detection dramatically improves sensitivity, especially in early disease stages when spirochete numbers may be low but specific antibodies are present.
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 antigen-specific sequences enable faster and more accurate diagnosis of TBRF by detecting multiple Borrelia species concurrently, improving sensitivity and specificity beyond existing methods.
Implementation Method 1
detecting a positive immunobinding reaction which indicates the presence of TBRF specific antibodies in the sample
Data Source
AI summary
The disclosure, in some aspects, provides antigen-specific amino acid sequences for tick-borne relapsing fever Borrelia species.