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An Ehrlichia canis isolate was obtained from an naturally infected dog exhibiting clinical signs of ehrlichiosis in São Paulo Municipality, state of São Paulo, Brazil. The isolate was characterized by PCR and DNA sequencing of portions of the ehrlichial genes dsb, 16SrRNA, and p28. Partial dsb and 16S rRNA sequences were identical to three and five other E. canis strains, respectively, from different countries and continents (including North America, Africa, Asia and Europe). Conversely, the p28 partial sequence for this E. canis (São Paulo) differed by 1, 2, and 2 nucleotides from the corresponding sequences of the E. canis strains Jake (from USA), Oklahoma (USA), and VHE (Venezuela), respectively. The results in this study indicate that E. canis is the only recognized Ehrlichia species infecting dogs in Brazil. Foi obtido um isolado de Ehrlichia canis a partir de um cão naturalmente infectado com sinais clínicos de erliquiose, oriundo do município de São Paulo, SP, Brasil. O isolado foi caracterizado molecularmente pela PCR e seqüenciamento de porções dos genes dsb,16S rRNA, e p28. A seqüência parcial dos genes dsb e 16Sr RNA apresentaram-se idênticas a três e cinco seqüências respectivamente, de E. canis provenientes de diferentes países e continentes (América do Norte, África, Ásia e Europa). Contrariamente, a seqüência parcial do gene p28 do isolado São Paulo diferiu em um nucleotídeo do isolado Jake (EUA) e dois nucleotídeos dos isolados Oklahoma (EUA) e VHE (Venezuelan Human Ehrlichia Venezuela). Atualmente, a E. canis é a única espécie de Ehrlichia que acomete cães no Brasil

In vitro isolation and molecular characterization of an Ehrlichia canis strain from São Paulo, Brazil