Rickettsial infection in animals and Brazilian spotted fever endemicity

Autor(es)

Sangioni, L. A. ; Vianna, M. C. B. ; Gennari, S. M. ; Soares, R. M. ; Galvão, M. A. M. ; Schumaker, T. T. S. ; Ferreira, F. ; Vidotto, O. ; Labruna, M. B. ; Horta, M. C. ^[10]

• Tipo de documento: Artigo Científico
• Fonte: Emerging Infectious Diseases; v. 11, n. 2, p. 265-270, Feb. 2005.
• Área do conhecimento: Ciências Agrárias - Medicina Veterinária
• Assunto(s): Rickettsioses em animais Febre maculosa

Resumo

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. (AU)

• Processo FAPESP: 00/02711-1 - Aspectos epidemiológicos da febre maculosa nos Estados de Minas Gerais e São Paulo
• Beneficiário: Solange Maria Gennari
• Modalidade de apoio: Auxílio à Pesquisa - Regular