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Coproantigens in taeniasis and echinococcosis
James C Allan1, Philip S Craig
1Cestode Zoonoses Research Group, Bioscience Research Institute University of Salford, UK. James.Allan@Pfizer.com
Parasitology International
|December 13, 2005
Summary
Detection of parasite-specific antigens in feces, known as coproantigens, significantly improves diagnosis for echinococcosis and taeniasis. These reliable tests offer high specificity and stability, aiding in surveillance of these zoonotic cestode infections.
Area of Science:
- Veterinary Parasitology
- Immunodiagnostics
- Molecular Diagnostics
Background:
- Taeniid cestode infections, including echinococcosis and taeniasis, pose significant public health challenges.
- Traditional diagnostic methods often lack sensitivity or practicality for widespread application.
- Modern immunodiagnostic and molecular techniques offer improved diagnostic capabilities.
Purpose of the Study:
- To evaluate the utility of parasite-specific antigen detection in feces (coproantigens) for diagnosing taeniid cestode infections.
- To highlight the advantages and characteristics of coproantigen tests for Echinococcus and Taenia species.
- To assess the role of coproantigen detection in epidemiological and control programs.
Main Methods:
- Development and application of taeniid coproantigen tests utilizing monoclonal or polyclonal antibodies against adult tapeworm antigens.
- Assessment of test characteristics including genus specificity, sensitivity, antigen stability, and correlation with infection burden.
- Comparison of coproantigen detection with traditional methods like microscopy.
Main Results:
- Coproantigen tests demonstrate high genus specificity (>95%) and detect parasite antigens weeks before patency.
- Antigen levels are independent of egg output and remain stable across a wide temperature range and in formalin-fixed samples.
- Coproantigen tests detected significantly more Taenia solium carriers than microscopy and showed a positive correlation with worm burden in Echinococcus infections.
Conclusions:
- Taeniid coproantigen detection is a highly effective and promising diagnostic approach for echinococcosis and taeniasis.
- The stability and early detection capabilities of coproantigen tests make them valuable tools for surveillance and control programs.
- Ongoing characterization of coproantigens aims to further enhance these diagnostic assays for improved management of zoonotic cestode infections.
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