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*
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.
