Anaplasma phagocytophilum Polypeptide Antigens for Specific Serodiagnosis
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Solution Overview
Problem
Current serodiagnostic tools for Anaplasma phagocytophilum cannot differentiate between infections caused by Anaplasma phagocytophilum and Anaplasma platys, and existing methods are inadequate for rapid, sensitive, and reliable detection of antibodies specific to Anaplasma phagocytophilum, especially during the acute phase of anaplasmosis.
Innovation Solution
Development of purified polypeptides that are at least 95% identical to specific sequences of Anaplasma phagocytophilum, which can be used to detect antibodies specific to the pathogen by forming polypeptide/antibody complexes, allowing for the differentiation between Anaplasma phagocytophilum and Anaplasma platys infections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If current serodiagnostic tools are used to detect Anaplasma infections, then detection can be performed, but the tools cannot differentiate between Anaplasma phagocytophilum and Anaplasma platys infections
Solution Approach 1:
The invention divides the detection process into separate specific tests: one test using A. phagocytophilum-specific antigens or antibodies to detect A. phagocytophilum infection, and another test using A. platys-specific antigens or antibodies to detect A. platys infection. This segmentation allows each test to be highly specific to its target pathogen, enabling differentiation between the two infections while maintaining detection capability.
2Reliability
If serologic tests are used to detect A. platys infection, then detection is possible, but the tests are inaccurate due to cross-reactivity with other Anaplasma species
Solution Approach 1:
The invention introduces species-specific antigens or antibodies as intermediaries to bridge the detection process. By using A. platys-specific antigens (such as purified polypeptides) or antibodies that are highly specific to A. platys, the test can detect A. platys infection without cross-reactivity interference from other Anaplasma species. This intermediary approach ensures reliable and accurate detection by eliminating the harmful cross-reactivity factor.
3Loss of time
If detection methods are used during the acute phase of anaplasmosis, then early diagnosis is possible, but measurable levels of antibodies against Aph antigens are not yet present
Solution Approach 1:
Instead of detecting antibodies (which are not yet present during the acute phase), the invention inverts the detection approach by detecting pathogen-specific antigens directly. By using A. phagocytophilum-specific antigens that can be detected through PCR or antigen detection assays, the method enables reliable diagnosis during the acute phase when antibody levels are undetectable, thus addressing both the timing and reliability requirements.
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 enables rapid and reliable detection of Anaplasma phagocytophilum infections by forming polypeptide/antibody complexes, providing a sensitive and specific means to identify antibodies in biological samples, thus aiding in the diagnosis and differentiation from Anaplasma platys infections.
Implementation Method 1
contacting one or more purified polypeptides with the test sample, under conditions that allow polypeptide/antibody complexes to form
Data Source
AI summary
The invention provides methods and compositions for the detection and treatment of Anaplasma phagocytophilum and Anaplasma platys infection.