Evaluation of multiple allergen simultaneous (sIgE) testing compared to intradermal testing in the etiological diagnosis of atopic dermatitis in horses.
Abstract: Although intradermal testing (IDT) is commonly used in the etiological diagnosis of allergies, in vitro testing for specific IgE (sIgE) is an attractive alternative. Currently, new laboratory techniques in veterinary allergological practice, including multiple allergen simultaneous tests (MASTs), gradually supersede in vivo tests. Both, serological (sIgE) and IDTs in fourteen atopic Malopolski horses were performed. Correlation and agreement between test results were evaluated. Receiver operating characteristic analysis showed that sIgE to had the best diagnostic performance (Area under the ROC curve [AUC] = 0.969), followed by (AUC = 0.844), (AUC = 0.813) and (AUC = 0.803). A significant positive correlation between IDT and MAST was found for (r = 0.870; = 0.00005), and (r = 0.657; = 0.011). There was significant moderate agreement for 2 of 5 allergens, (κ = 0.569) and (κ = 0.485) in semiquantitative assessment and significant fair to substantial agreement for 3 of 5 allergens, (κ = 0.689), (κ = 0.569), (κ = 0.432) in dichotomic assessment. Sensitivity ranged from 44% to 89%, depending on the allergen, while specificity was significantly higher for all allergens in MAST (60%-100%); the mean accuracy was 73% (manufacturer cut-off) and 77.4% (optimal cut-off) based on the Youden index. Compared with IDT, serological MAST showed good detection performance for 60% allergen sIgE in dichotomic assessment with substantial diagnostic capability, but careful clinical interpretation is needed for some allergens.
© 2019 The Korean Society of Veterinary Science.
Publication Date: 2019-11-28 PubMed ID: 31775187PubMed Central: PMC6883192DOI: 10.4142/jvs.2019.20.e60Google Scholar: Lookup
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- Comparative Study
- Journal Article
- Allergies
- Clinical Pathology
- Clinical Study
- Comparative Study
- Correlation Analysis
- Diagnosis
- Diagnostic Technique
- Disease Diagnosis
- Disease Etiology
- Equine Health
- Horses
- Immunoglobulin E
- Immunology
- In Vitro Research
- In Vivo
- Laboratory Methods
- Sensitivity and Specificity
- Serology
- Veterinary Medicine
- Veterinary Procedure
- Veterinary Research
Summary
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This research explores the effectiveness of intradermal testing (IDT) versus in vitro specific IgE (sIgE) testing, specifically using multiple allergen simultaneous tests (MASTs) for detecting allergies in Malopolski horses. The study found substantial accuracy and potential in using MASTs, but advises cautious clinical interpretation for some allergens.
Research Methodology
- The study involved comparing serological (sIgE) tests and intradermal tests (IDTs) in fourteen atopic Malopolski horses to investigate alternative methods for diagnosing allergies.
- A quantitative analysis was carried out to evaluate the correlation and agreement between the two types of test results.
- Receiver operating characteristic (ROC) analysis was performed to measure the diagnostic performance of these tests.
Key Findings
- The ROC analysis indicated that the sIgE test had the highest diagnostic performance with a 96.9% area under the ROC curve (AUC), followed by other unspecified allergens with AUCs ranging from 80.3% to 84.4%.
- There was a significant positive correlation between IDT and MAST results for two particular allergens with correlation coefficients of 0.870 and 0.657.
- In the case of semiquantitative assessment, there was a notable moderate agreement for two out of five allergens, while for dichotomous assessment, there was a significant fair to substantial agreement for three out of five evaluated allergens.
- The sensitivity of the tests ranged from 44% to 89%, depending on the allergen. However, MAST proved to have higher specificity for all allergens with a range of 60% to 100%.
- The overall accuracy of the test results averaged from 73% to 77.4% based on the Youden index.
Conclusion
- The study suggests that the serological MAST testing methodology shows good allergen detection performance, specifically for 60% allergen sIgE in a dichotomic assessment.
- However, it also suggests that while MAST has substantial diagnostic capabilities, certain allergens require careful clinical interpretation.
Cite This Article
APA
Wilkołek P, Szczepanik M, Sitkowski W, Rodzik B, Pluta M, Taszkun I, Gołyński M.
(2019).
Evaluation of multiple allergen simultaneous (sIgE) testing compared to intradermal testing in the etiological diagnosis of atopic dermatitis in horses.
J Vet Sci, 20(6), e60.
https://doi.org/10.4142/jvs.2019.20.e60 Publication
Researcher Affiliations
- Sub-Department of Clinical Diagnostics and Veterinary Dermatology, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, 20-612 Lublin, Poland. pwilku@poczta.onet.pl.
- Sub-Department of Clinical Diagnostics and Veterinary Dermatology, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, 20-612 Lublin, Poland.
- Sub-Department of Clinical Diagnostics and Veterinary Dermatology, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, 20-612 Lublin, Poland.
- Institute of Mathematics, Marie Curie-Skłodowska University, 20-031 Lublin, Poland.
- Equine Breeding and Management Unit, Department of Biology and Animal Breeding, University of Life Sciences in Lublin, 20-950 Lublin, Poland.
- Sub-Department of Clinical Diagnostics and Veterinary Dermatology, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, 20-612 Lublin, Poland.
- Nicolaus Copernicus University in Torun, Faculty of Biological and Veterinary Sciences, 87-100 Torun, Poland.
MeSH Terms
- Allergens / analysis
- Animals
- Dermatitis, Atopic / diagnosis
- Dermatitis, Atopic / veterinary
- Enzyme-Linked Immunosorbent Assay / methods
- Enzyme-Linked Immunosorbent Assay / veterinary
- Female
- Horse Diseases / diagnosis
- Horses
- Intradermal Tests / methods
- Intradermal Tests / veterinary
- Male
- Sensitivity and Specificity
Grant Funding
- DS-3/2009-2017 / University of Life Sciences in Lublin
Conflict of Interest Statement
The authors declare no conflicts of interest.
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