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Veterinary clinical pathology2016; 45(2); 335-346; doi: 10.1111/vcp.12364

Validation of a novel saliva-based ELISA test for diagnosing tapeworm burden in horses.

Abstract: Tapeworm infections pose a significant threat to equine health as they are associated with clinical cases of colic. Diagnosis of tapeworm burden using fecal egg counts (FECs) is unreliable, and, although a commercial serologic ELISA for anti-tapeworm antibodies is available, it requires a veterinarian to collect the blood sample. A reliable diagnostic test using an owner-accessible sample such as saliva could provide a cost-effective alternative for tapeworm testing in horses, and allow targeted deworming strategies. Objective: The purpose of the study was to statistically validate a saliva tapeworm ELISA test and compare to a tapeworm-specific IgG(T) serologic ELISA. Methods: Serum samples (139) and matched saliva samples (104) were collected from horses at a UK abattoir. The ileocecal junction and cecum were visually examined for tapeworms and any present were counted. Samples were analyzed using a serologic ELISA and the saliva tapeworm test. The test results were compared to tapeworm numbers and the various data sets were statistically analyzed. Results: Saliva scores had strong positive correlations with both infection intensity (0.74) and serologic results (Spearman's rank coefficients; 0.74 and 0.86, respectively). The saliva tapeworm test was capable of identifying the presence of one or more tapeworms with 83% sensitivity and 85% specificity. Importantly, no high-burden (more than 20 tapeworms) horses were misdiagnosed. Conclusions: The saliva tapeworm test has statistical accuracy for detecting tapeworm burdens in horses with 83% sensitivity and 85% specificity, similar to those of the serologic ELISA (85% and 78%, respectively).
Publication Date: 2016-05-24 PubMed ID: 27218436DOI: 10.1111/vcp.12364Google Scholar: Lookup
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  • Journal Article
  • Validation Study

Summary

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The research article presents the introduction and validation of a new saliva-based test for determining the level of tapeworm infection in horses. This novel diagnostic test could allow a cost-effective and accessible way to identify tapeworms, and thus curb related health risks in equines.

Objective of the Study

  • The main goal of this project was to evaluate and authenticate a saliva-based ELISA (enzyme-linked immunosorbent assay) test for diagnosing and quantifying tapeworm infections in horses.
  • At the same time, the results from this newly developed diagnostic tool were contrasted to those acquired from a tapeworm-specific IgG(T) serologic ELISA, a method currently in use but it needs a professional to collect horse’s blood.

Methodology

  • The researchers collected serum samples from 139 horses at a UK-based abattoir, along with saliva samples from 104 of those horses.
  • For each of these equines, the area at the junction of the ileum and cecum was visually inspected to identify and count any tapeworms.
  • Each sample was then tested using both the established serologic ELISA and the newly proposed saliva tapeworm test, with the results compared to the physical count of tapeworms.
  • The collected data was further subjected to in-depth statistical analyses for a reliable comparison of the two assessment methods.

Results

  • The saliva test’s reported results align strongly with both the infection severity and the serologic ELISA results. The correlation coefficients were found to be 0.74 and 0.86, respectively.
  • Significantly, the saliva tapeworm test could reliably identify the presence of one or more tapeworms, with an accuracy of 83% and a specificity of 85%.
  • A crucial finding was that no high-burden horses (i.e., horses with more than 20 tapeworms) were misdiagnosed using the saliva test.

Conclusions

  • Ultimately, the saliva tapeworm test was found to be statistically accurate, with an effectiveness and precision nearly on par with the existing serologic ELISA – 83% versus 85% respectively for sensitivity, and 85% versus 78% respectively for specificity.
  • The success of this research would suggest that the saliva-based ELISA test offers a practical, efficient, and cost-effective approach for diagnosing tapeworm infections in horses, thereby facilitating better-targeted anti-tapeworm strategies.

Cite This Article

APA
Lightbody KL, Davis PJ, Austin CJ. (2016). Validation of a novel saliva-based ELISA test for diagnosing tapeworm burden in horses. Vet Clin Pathol, 45(2), 335-346. https://doi.org/10.1111/vcp.12364

Publication

ISSN: 1939-165X
NlmUniqueID: 9880575
Country: United States
Language: English
Volume: 45
Issue: 2
Pages: 335-346

Researcher Affiliations

Lightbody, Kirsty L
  • Austin Davis Biologics, Great Addington, UK.
Davis, Paul J
  • Austin Davis Biologics, Great Addington, UK.
Austin, Corrine J
  • Austin Davis Biologics, Great Addington, UK.

MeSH Terms

  • Animals
  • Antibodies, Helminth / analysis
  • Cestoda / immunology
  • Cestode Infections / diagnosis
  • Cestode Infections / veterinary
  • Enzyme-Linked Immunosorbent Assay / veterinary
  • Horse Diseases / diagnosis
  • Horse Diseases / parasitology
  • Horses
  • Immunoglobulin G / analysis
  • Immunoglobulin G / immunology
  • Saliva / immunology

Citations

This article has been cited 15 times.
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