Peer-reviewed veterinary case report
How accurate are flea allergy tests for dogs with skin problems
By Laffort-Dassot, Catherine et al.·Published in Veterinary dermatology·2004·15 rue Lugeol, France·View original on PubMed →
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Original publication title: Diagnosis of flea allergy dermatitis: comparison of intradermal testing with flea allergens and a FcepsilonRI alpha-based IgE assay in response to flea control.
- Species:
- dog
Plain-English summary
A group of 15 dogs with flea allergy dermatitis were tested to see how well different methods could diagnose their condition. The tests included skin tests with flea allergens and a blood test measuring specific antibodies. The skin tests using flea saliva were the most accurate, helping to correctly identify the allergy in most cases. The study found that skin testing is generally better than blood tests for diagnosing flea allergies, which can help vets provide the right treatment for affected dogs.
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Abstract
The objective of this study was to evaluate the accuracy of in vivo and in vitro tests in the diagnosis of flea allergy dermatitis in comparison with history, clinical signs and response to flea control. Intradermal testing using four different sources of flea allergens and FcepsilonRIalpha-based immunoglobulin (Ig)E assays were performed in 15 flea-allergic dogs, 15 atopic dogs and 15 dogs infested with fleas but showing no clinical signs of skin disease. Sensitivity, specificity, negative predictive value, positive predictive value and accuracy were calculated for all five tests and results varied greatly. Sensitivity, specificity and overall accuracy were 27, 83 and 64%, respectively, for one extract (Isotec), 67, 90 and 82% for another extract (Greer), 93, 90 and 91% for flea saliva, 40, 90 and 73% for the recombinant Cte f 1 both produced by Heska Corp. and 87, 53 and 64% for a FcepsilonRIalpha-based IgE assay. These results indicate that intradermal testing with flea extracts is more accurate in the diagnosis of flea allergy dermatitis than in vitro tests. Moreover, pure flea saliva used as a reagent for intradermal testing provided the best results in terms of sensitivity, specificity and overall accuracy although the Greer extract, a whole body flea extract, also allowed a good correlation between intradermal testing results and clinical approach to flea allergy dermatitis diagnosis.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/15500485/