Made available in DSpace on 2016-04-28T20:15:24Z (GMT). No. of bitstreams: 1 2006- Victor do Espirito Santo Cunha.pdf: 1132781 bytes, checksum: 5edd69d626ede6488b658d61c07e111b (MD5) Previous issue date: 2006-02-22 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico / The objective of this case-control study was to evaluate whether allergenic extracts from five species of house dust mites standardized for humans may be taken into account in the diagnosis of the canine atopic dermatitis. Extracts of Dermatophagoides pteronyssinus, D. farinae, Blomia tropicalis, Lepidoglyphus destructor and Tyrophagus putrescentiae have been evaluated through intradermal testing on 45 dogs, from which 20 belonged to the control group and 25 suffered from allergic dermatitis. There was a significant difference on the response pattern between the two groups (p<0,05). Only one dog (5%) from the control group has reacted to the intradermal test, whereas from the allergic group, 14 dogs (56%) have presented at least one positive reaction (odds ratio = 24,2). Most of the positive reactions observed in the allergic group were to the extracts of T. putrescentiae or L. destructor, each one inducing reactions on ten dogs (40%). The D. farinae, D. pteronyssinus e B. tropicalis extracts were responsible for positive reactions on 7 (28%), 3 (12%) and 3 (12%) dogs, respectively. The intradermal testing sensitivity and specificity were 56% and 95%, respectively, and the positive predictive value and the negative predictive value were 93% and 63%, respectively. / O presente estudo do tipo caso-controle teve como objetivo avaliar se extratos alerg?nicos de cinco esp?cies de ?caros da poeira domiciliar padronizados para humanos podem ser utilizados no diagn?stico da dermatite at?pica canina. Extratos de Dermatophagoides pteronyssinus, D. farinae, Blomia tropicalis, Lepidoglyphus destructor e Tyrophagus putrescentiae foram avaliados atrav?s de testes intrad?rmicos em 45 c?es, dos quais 20 controles e 25 com dermatite al?rgica. Uma diferen?a significativa foi observada no padr?o de respostas entre os dois grupos (p<0,05). Apenas um animal (5%) do grupo controle reagiu ao teste cut?neo, enquanto que no grupo dos al?rgicos 14 c?es (56%) apresentaram pelo menos uma rea??o positiva (odds ratio = 24,2). As maiores freq??ncias de rea??es positivas observadas no grupo dos al?rgicos foram aos extratos de T. putrescentiae ou L. destructor, cada um induzindo rea??es em 10 (40%) c?es. Os extratos de D. farinae, D. pteronyssinus e B. tropicalis foram respons?veis por rea??es positivas em 7 (28%), 3 (12%) e 3 (12%) c?es, respectivamente. A sensibilidade e a especificidade dos testes intrad?rmicos foram de 56% e 95%, respectivamente e, o valor preditivo positivo e valor preditivo negativo de 93% e 63%, respectivamente. .