New records of Rickettsia bellii-infected ticks in Brazil

  • Francisco Borges Costa Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia
  • Amália Regina Barbieri Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia
  • Matias pablo Juan Szabó Universidade Federal de Uberlândia, Faculdade de Medicina Veterinária
  • Vanessa Nascimento Ramos Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia
  • Ubiratan Piovezan Empresa Brasileira de Pesquisa Agropecuária (Embrapa Pantanal)
  • Marcelo Bahia Labruna Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia
Keywords: Amblyomma dubitatum, Amblyomma pseudoconcolor, Isolation

Abstract

This study investigated the occurrence of rickettsial infection in ticks collected from wild animals in two areas of Brazil. Amblyomma dubitatum ticks were collected from a capybara (Hydrochoerus hydrochaeris) in Guarda-Mor municipality, state of Minas Gerais, and Amblyomma pseudoconcolor ticks were collected from a six-banded armadillo (Euphractus sexcinctus) in Corumbá municipality, state of Mato Grosso do Sul. Attempts to isolate rickettsia in Vero cell culture were performed with one A. dubitatum tick and one A. pseudoconcolor tick, which were previously shown by the hemolymph test to contain Rickettsia-like structures within their hemocytes. Rickettsiae were successfully isolated in Vero cell culture from the two tick species. The two isolates were identified as Rickettsia bellii, since gltA partial sequences were 99.9%-100% identical to corresponding sequences of R. bellii in GenBank. While there have been several previous reports of R. bellii infecting A. dubitatum ticks, we provide the first report for A. pseudoconcolor, which increases to 25 the number of R. bellii-infected tick species in the American continent.

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Author Biography

Francisco Borges Costa, Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia

Departamento de Medicina Veterinária e Saúde Animal - VPS

Epidemiologia Experimental Aplicada às Zoonoses

Published
2017-05-19
How to Cite
Costa, F., Barbieri, A., Szabó, M. pablo, Ramos, V., Piovezan, U., & Labruna, M. (2017). New records of Rickettsia bellii-infected ticks in Brazil. Brazilian Journal of Veterinary Research and Animal Science, 54(1), 92-95. https://doi.org/10.11606/issn.1678-4456.bjvras.2017.114141
Section
PRELIMINARY NOTE