Rickettsial infection in animals and brazilian spotted fever endemicity.

• Autor(a) principal: Sangioni, Luis Antônio
• Data de Publicação: 2005
• Outros Autores: Horta, Maurício Cláudio, Vianna, Manoella Campostrini Barreto, Gennari, Solange Maria, Soares, Rodrigo Martins, Galvão, Márcio Antônio Moreira, Schumaker, Teresinha T. S., Ferreira, Fernando, Vidotto, Odilon, Labruna, Marcelo Bahia
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFOP
• Texto Completo: http://www.repositorio.ufop.br/handle/123456789/3787

We compared the rickettsial infection status of Amblyomma cajennense ticks, humans, dogs, and horses in both Brazilian spotted fever (BSF)–endemic and –nonendemic areas in the state of São Paulo, Brazil. Most of the horses and few dogs from BSF-endemic areas had serologic titers against Rickettsia rickettsii antigens. In contrast, no dogs or horses from BSF-nonendemic areas had serologic titers against R. rickettsii antigens, although they were continually exposed to A. cajennense ticks. All human serum samples and ticks from both areas were negative by serologic assay and polymerase chain reaction, respectively. Our results indicate that surveys of horse serum are a useful method of BSF surveillance in areas where humans are exposed to A. cajennense ticks. In addition, we successfully performed experimental infection of A. cajennense ticks with R. parkeri.