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Volume 11, Number 2—February 2005

Research

Rickettsial Infection in Animals and Brazilian Spotted Fever Endemicity

Luis A. Sangioni*†, Maurício C. Horta*, Manoella C.B. Vianna*, Solange M. Gennari*, Rodrigo M. Soares*, Márcio A.M. Galvão‡, Teresinha T.S. Schumaker*, Fernando Ferreira*, Odilon Vidotto§, and Marcelo B. Labruna*Comments to Author 
Author affiliations: *University of São Paulo, São Paulo, São Paulo, Brazil; †Centro Integrado de Ensino Superior – Campus Universitário, Campo Mourão, Paraná, Brazil; ‡Federal University of Ouro Preto, Ouro Preto, Minas Gerais, Brazil; §Londrina State University, Londrina, Paraná, Brazil

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Table

Results of indirect immunofluorescence assay for antibodies to Rickettsia rickettsii in humans and domestic animals from 3 BSF-endemic areas (farms 1–3)* and 3 BSF-nonendemic areas (farms 4–6), São Paulo, Brazil†

Source Reactive sera‡/total sera tested (% reactive)
Farm 1 Farm 2 Farm 3 Farm 4 Farm 5 Farm 6
Humans 0/20 (0) 0/21 (0) 0/9 (0) 0/4 (0) 0/2 (0) 0/10 (0)
Horses 9/10 (90) 4/7 (57.1) 4/5 (80) 0/16 (0) 0/10 (0) 0/21 (0)
Dogs 1/4 (25) 4/6 (66.7) 0/6 (0) No dogs 0/4 (0) 0/1 (0)

*Data from Horta et al. (17).
†BSF, Brazilian spotted fever.
‡Sera showing titers ≥64 for R. rickettsii antigen.

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