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Use este identificador para citar ou linkar para este item: https://repositorio.ufba.br/handle/ri/5306
Tipo: Artigo de Periódico
Título: Validation of an ELISA method for the serological diagnosis of canine brucellosis due to Brucella canis
Título(s) alternativo(s): Research in veterinary science
Autor(es): Oliveira, Maria Zoraida Daltro de
Vale, Vera
Keid, Lara
Freire, Songeli Menezes
Nascimento, Roberto José Meyer
Portela, Ricardo Wagner Dias
Melo, Stella Maria Barrouin
Autor(es): Oliveira, Maria Zoraida Daltro de
Vale, Vera
Keid, Lara
Freire, Songeli Menezes
Nascimento, Roberto José Meyer
Portela, Ricardo Wagner Dias
Melo, Stella Maria Barrouin
Abstract: In the present study, the validation of an enzyme-linked immunosorbent assay (ELISA) for serodiagnosis of canine brucellosis is described. Two different antigenic extracts, obtained by heat or ultrasonic homogenization of microbial antigens from a wild isolate of Brucella canis bacteria, were compared by ELISA and Western blot (WB). A total of 145 canine sera were used to define sensitivity, specificity and accuracy of the ELISA as follows: (1) sera from 34 animals with natural B. canis infection, confirmed by blood culture and PCR, as well as 51 sera samples from healthy dogs with negative results by the agar–gel immunodiffusion (AGID) test for canine brucellosis, were used as the control panel for B. canis infection; and (2) to scrutinize the possibility of cross reactions with other common dog infections in the same geographical area in Brazil, 60 sera samples from dogs harboring known infections by Leptospira sp., Ehrlichia canis, canine distemper virus (CDV), Neospora caninum, Babesia canis and Leishmania chagasi (10 in each group) were included in the study. The ELISA using heat soluble bacterial extract (HE-antigen) as antigen showed the best values of sensitivity (91.18%), specificity (100%) and accuracy (96.47%). In the WB analyses, the HE-antigen showed no cross-reactivity with sera from dogs with different infections, while the B. canis sonicate had various protein bands identified by those sera. The performance of the ELISA standardized with the heat soluble B. canis antigen indicates that this assay can be used as a reliable and practical method to confirm infection by this microorganism, as well as a tool for seroepidemiological studies.
Palavras-chave: Brucella canis
Canine Brucellosis
ELISA
Validation
Serology
Diagnosis
URI: http://www.repositorio.ufba.br/ri/handle/ri/5306
Data do documento: 2011
Aparece nas coleções:Artigo Publicado em Periódico (EMV)

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