RESUMO
A survey of the Trypanosoma vivax genome was carried out by the genome sequence survey (GSS) approach resulting in 1,086 genomic sequences. A total of 455 high-quality GSS sequences were generated, consisting of 331 non-redundant sequences distributed in 264 singlets and 67 clusters in a total of 135.5 Kb of the T. vivax genome. The estimation of the overall G+C content, and the prediction of the presence of ORFs and putative genes were carried out using the Glimmer and Jemboss packages. Analysis of the obtained sequences was carried out by BLAST programs against 12 different databases and also using the Conserved Domain Database, InterProScan, and tRNAscan-SE. Along with the existing 23 T. vivax entries in the GenBank, the 32 putative genes predicted and the 331 non-redundant GSS sequences reported herein represent new potential markers for the development of PCRbased assays for specific diagnosis and typing of Trypanosoma vivax.
Assuntos
Genoma de Protozoário , Trypanosoma vivax/genética , Trypanosoma vivax/fisiologia , Algoritmos , Animais , Biologia Computacional , Bases de Dados Genéticas , Bases de Dados de Ácidos Nucleicos , Etiquetas de Sequências Expressas , Biblioteca Gênica , Genes de Protozoários/genética , Marcadores Genéticos , Fases de Leitura Aberta , Reação em Cadeia da Polimerase , Proteínas de Protozoários/fisiologia , RNA de Transferência/genética , Análise de Sequência de DNA , SoftwareRESUMO
Since little information is available on the epizootiological status of Trypanosoma evansi in South America and particularly Brazil, we evaluated equine serum samples collected in 1993, 1994, 1995 and 1997 for the presence of antibodies against this trypanosome species. Our study shows corroborative evidence about the correlation among high T. evansi seroprevalence and the rainy season in the Pantanal, Brazil. The higher seroprevalence was 79.2 (por cento) in horses from a ranch located in the Nhecolândia sub-region in 1994 and the lower 5.8 (por cento) in animals from the same ranch in 1997. No seroprevalence was found in 1993. The possible re-introduction of T. evansi in the region as well as the relationship among our results with the outbreaks reported in 1994, are briefly discussed.