Peer-reviewed veterinary case report
How food allergy skin tests help dogs with chronic itching
By Possebom, Juliane et al.·Published in Veterinary dermatology·2022·Programa de Pó, Brazil·View original on PubMed →
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Original publication title: Combined prick and patch tests for diagnosis of food hypersensitivity in dogs with chronic pruritus.
- Species:
- dog
Plain-English summary
A group of 21 dogs with chronic itching were tested using a combination of prick and patch tests to identify food allergies. After the tests, the dogs were put on special elimination diets based on the results, and 76% of them showed significant improvement in their itching after 30 and 60 days. The tests helped diagnose food hypersensitivity, allowing for better diet choices to reduce symptoms. This approach could be beneficial for dogs suffering from similar issues.
People also search for: dog itching food allergies · how to test for food allergies in dogs · elimination diet for dog allergies
Abstract
BACKGROUND: Previous studies have shown that patch testing with food extracts can assist formulation of elimination diets (ED) in human patients with suspected adverse food reactions (AFR). Little is known about the use of these tests in dogs. OBJECTIVES: To evaluate the effectiveness of a combination of prick and patch testing in current protocols, and food challenge (FC) tests in dogs with AFR. METHODS AND MATERIALS: Prick and patch tests were performed on 21 dogs with chronic, nonseasonal pruritus. Dogs then were fed an ED formulated on the basis of the results. All dogs with improved clinical signs then were challenged with a food to which there had been a positive reaction in the tests. Six dogs subsequently were challenged with a food to which they had been negative on testing. Pruritus Visual Analog Scale (pVAS) and Canine Atopic Dermatitis Extent and Severity Index, 4th iteration (CADESI-04) were evaluated on Day (D)0, D30 and D60 of the ED. Sensitivity (SE), specificity (SP), positive (PPV) and negative (NPV) predictive values, and the Kappa (κ)value were calculated. RESULTS: Of the 21 dogs, there was a significant mean improvement in pVAS and CADESI-04 scores in 16 (76%) dogs after D30 (P < 0.01) and D60 (P < 0.01) of the ED. There were no statistical differences between D30 and D60. The combination of tests had SE, SP, PPV, NPV and κ values of 80%, 66.7%, 66.7%, 80% and -0.17, respectively. CONCLUSIONS AND CLINICAL RELEVANCE: The combination of prick and patch testing reached high values of SE and NPV. A diagnosis of AFR was made in 76% of the dogs, and test results were useful for the selection of an ED.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/35014738/