Detection of anti: Rickettsia spp. antibodies in domestic chickens of extensive breeding in an endemic area for spotted fever in the state of Rio Grande do Sul, Brazil

  • Maciel J
  • Krawczak F
  • Oliveira C
  • et al.
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Abstract

The goal of this study was to investigate anti-Rickettsia spp. antibodies in sera of domestic chickens (Gallus gallus domesticus) of extensive breeding in Cerro Largo county, considered an endemic area for spotted fever in the State of Rio Grande do Sul, Brazil. Three hundred blood samples were collected and anti-Rickettsia spp. antibodies were evaluated by indirect immunofluorescence assay (IFA) in the sera obtained. The occurrence of anti-Rickettsia spp. antibodies detected in this study was 1.33% (4/300), with endpoint titers ranging from 64 to 256 for Rickettsia rickettsiii, R. parkeri and/or R. bellii. The results suggest these domestic chickens do not participate as a reservoir and/or amplifying host in the epidemiology of spotted fever in that endemic area. The present study consists in the first serological survey in Gallus gallus domesticus to Rickettsiae-spotted fever group in Brazil.Este estudo teve como objetivo pesquisar anticorpos anti-Rickettsia spp. em soros de galinhas domésticas (Gallus gallus domesticus) de criação extensiva, provenientes de área considerada endêmica para febre maculosa no estado do Rio Grande do Sul. Foram coletadas 300 amostras de sangue e os soros obtidos foram testados para anticorpos anti-Rickettsia spp. pela Reação de Imunofluorescência Indireta (RIFI). A ocorrência de anticorpos anti-Rickettsia spp. observada foi de 1,33% (4/300), com títulos variando de 64 a 256 para Rickettsia rickettsii, Rickettsia parkeri e/ou Rickettsia bellii. Os resultados sugerem que essas galinhas domésticas não participam como reservatório e/ou hospedeiro amplificador na epidemiologia da febre maculosa na área endêmica. O presente estudo consiste na primeira pesquisa sorológica em Gallus gallus domesticus para rickettsia do grupo da febre maculosa no Brasil.

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Maciel, J. F., Krawczak, F. da S., Oliveira, C. S. de, Moraes-Filho, J., Labruna, M. B., Botton, S. de A., … Sangioni, L. A. (2013). Detection of anti: Rickettsia spp. antibodies in domestic chickens of extensive breeding in an endemic area for spotted fever in the state of Rio Grande do Sul, Brazil. Ciência Rural, 43(11), 2037–2041. https://doi.org/10.1590/s0103-84782013005000123

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