Brazilian spotted fever in cart horses in a non-endemic area in Southern Brazil.

Autor: Freitas MC; Laboratório de Doenças Parasitárias, Departamento de Medicina Veterinária, Setor de Ciências Agrárias, Faculdade de Medicina Veterinária e Zootecnia, Universidade Federal do Paraná - UFPR, Rua dos Funcionários, 1540, Curitiba - PR, Brazil. molento@ufpr.br, Grycajuk M, Molento MB, Bonacin J, Labruna MB, Pacheco Rde C, Moraes-Filho J, Deconto I, Biondo AW
Jazyk: angličtina
Zdroj: Revista brasileira de parasitologia veterinaria = Brazilian journal of veterinary parasitology : Orgao Oficial do Colegio Brasileiro de Parasitologia Veterinaria [Rev Bras Parasitol Vet] 2010 Apr-Jun; Vol. 19 (2), pp. 130-1.
DOI: 10.4322/rbpv.01902012
Abstrakt: Brazilian Spotted Fever (BSF) is an often fatal zoonosis caused by the obligate intracellular bacterium Rickettsia rickettsii. The disease is generally transmitted to humans by Amblyomma spp. ticks. Serological evidence of past infection by R. rickettsii has been reported in horses, but the pathogenicity of R. rickettsii in horses remains unknown. Cart horses are still widely used in urban and urban fringe areas in Brazil, and these animals may constitute suitable sentinels for BSF human in these areas, for example, in Sao Jose dos Pinhais, where the first BSF human case in the state of Parana was diagnosed. Serum samples were randomly obtained from 75 cart horses between April 2005 and June 2006 and were tested by means of the indirect immunofluorescence assay (IFA) for antibodies against rickettsia of the spotted fever group. A total of 9.33% of the animals were considered positive, with titers ranging from 64 to 1,024. These results indicate the presence of the agent in such areas, although at low rates.
Databáze: MEDLINE