Sorologia para Borrelia burgdorferi em eq?inos do Estado do Par? e caracteriza??o genot?pica de isolados de Borrelia spp

• Ano de defesa: 2007
• Autor(a) principal: Madureira, Renata Cunha
• Orientador(a): Fonseca, Adivaldo Henrique da
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal Rural do Rio de Janeiro
• Programa de Pós-Graduação: Programa de P?s-Gradua??o em Ci?ncias Veterin?rias
• Departamento: Instituto de Veterin?ria
• País: Brasil
• Palavras-chave em Português: Spirochaetae; PCR; imunodiagn?stico
• Palavras-chave em Inglês: imunoassay
• Área do conhecimento CNPq: Medicina Veterin?ria
• Link de acesso: https://tede.ufrrj.br/jspui/handle/tede/814

Spirochetes of the genus Borrelia attack animals and humans all over the world, causing different types of diseases. The unique species of Borrelia known and identified in Brazil which infects bovines and equines is B. theileri, transmitted by Rhipicephalus (Boophilus) microplus. Several studies were been made to identify another spirochete that circulates in the country and infects both animals and humans, providing clinical symptoms regarding Lyme disease (LD). The objectives of this work were to determine the frequency of serum-positive animals for Borrelia burgdorferi stricto sensu in equines of the Maraj? Island and the municipality of Castanhal, State of Par?; to caracterize morfometrically and genotypically isolates of B. theileri from equine and to analyze genotipycally spirochetes the tick Rhipicephalus (Boophilus) microplus, and human, by analysis of partial sequence of the gene 16S rRNA, fla and rpoB. Serum from 105 equines from the Maraj? Island and 103 from Castanhal municipality were collected and analyzed by indirect ELISA test. Fifteen equines (7.2% of the total) were serum-positive, being 10 from the Maraj? Island (9.5%) and five from the Castanhal municipality (4.9%). For the morfometric and genotypic characterization was collected serum of equine from the Rio de Janeiro State. Tick isolate was obtained from supernatant of a cell culture of ticks from the Mato Grosso do Sul State. Human isolate was obtained from blood sample of a woman, from the Serop?dica municipality, RJ, with LDsimile. The PCR was carried through using primers for the gene 16S rRNA, fla and rpoB. The products of amplification were cloned and sequenced. The analysis of the sequences of the isolated of equine for the genes 16S rRNA and fla of 99% (609/611) and 98% (222/226) of identity with sequences of B. theileri, respectively, in set with morfometric analysis (17.2 ? 3.6?m of length; 10 ? 2 espiras) revealed to be the microrganism in question, B. theileri. For the gene rpoB it was observed 92%(250/270) of identity with sequences of B. hermisii. The analysis of the sequences of the tick isolated revealed an identification of 100% (177/177) for the gene 16S rRNA with sequences of B. burgdorferi deposited in "GeneBank", 100% of identity (23/23) for the gene fla with B. theileri and 92% of identity (250/270) for the gene rpoB with sequence of B. hermisii. The analysis of the sequences of the human isolated revealed an identification of 99% (886/889) for the gene 16S rRNA with B. burgdorferi sequences. The presence of antibodies against Borrelia burgdorferi in equines from both places is an indicative of the presence of Borrelia sp., and, despite the lower frequency of infected animals, attention is needed for the possible occurrence of human borreliosis in those areas, considering the importance of this emergent zoonosis. This is the first genotypic characterization of a Brazilian isolate of B. theileri, as well as the first report of species of Borrelia different of B. theileri attack R. (Boophilus) microplus and confirmation of the presence of the genus Borrelia causing LD-simile in Brazil.