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  • Author or Editor: Sebastian G. Schleifer x
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Abstract

Objective—To evaluate skin test reactivity to environmental allergens in healthy cats and in cats with atopic dermatitis (AD).

Animals—10 healthy cats and 10 cats with AD.

Procedure—10 allergens in serial dilutions were injected ID on the lateral aspect of the thorax of sedated cats. Histamine (0.01% solution) and buffer solutions were used as positive and negative controls, respectively. Immediately after the last injection, 10% fluorescein solution was administered IV. Skin test results were evaluated with ultraviolet light after 15 to 30 minutes and at 4 and 6 hours by 2 independent observers. In the control group, skin tests were repeated after 6 weeks. Skin test reactivity and the nature of the immunoglobulin involved were investigated by use of the Prausnitz-Küstner test with untreated and heat-treated cat sera.

Results—Intertest and interobserver agreement were high when measurement of the diameter of the fluorescent wheal was used to evaluate skin test responses, compared with assessment of its intensity. In both groups of cats, immediate skin test reactivity was observed as an IgE-mediated reaction, as an IgG-mediated reaction, and as a result of nonspecific mast cell degranulation. There was no correlation between allergen concentration and the type of reaction observed.

Conclusions and Clinical Relevance—Skin test reactivity in cats should be evaluated after IV administration of 10% fluorescein solution by means of a Prausnitz-Küstner test to differentiate among IgEmediated, IgG-mediated, and nonspecific reactions. (Am J Vet Res 2003;64:773–778)

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in American Journal of Veterinary Research

Abstract

Objective—To investigate the possibility that variants in the acidic or basic keratin genes or in desmoglein 1 may cause the clinical manifestation of familial footpad hyperkeratosis in Irish Terriers.

Animals—11 dogs belonging to 2 related affected pedigrees of Irish Terriers.

Procedure—Genomic DNA was extracted from blood samples obtained from each dog. The DNA markers linked to the genes keratin 2, keratin 9, and desmoglein 1 were amplified by use of a polymerase chain reaction technique, and length of the products was determined by use of an automatic DNA analyzer.

Results—All tested markers yielded information. None of the markers (genotype) cosegregated with the clinical status of the dogs (phenotype) in the 2 pedigrees.

Conclusions and Clinical Relevance—Mutations in the genes encoding keratin 2 and 9 as well as desmoglein 1 are highly unlikely to be the primary cause of familial footpad hyperkeratosis in Irish Terriers. (Am J Vet Res 2003;64:715–720)

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in American Journal of Veterinary Research