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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 92, No. 4, 1997, pp. 477-481
Bioline Code: oc97084
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 92, No. 4, 1997, pp. 477-481

 en Rickettsiae-infected ticks in an endemic area of spotted fever in the State of Minas Gerais, Brazil
Elba Regina Sampaio de Lemos; Raimundo Diogo Machado; Fernando Dias de Avila Pires; Sergio Lisboa Machado; Ligia Maria Cantarino da Costa & Jose Rodrigues Coura

Abstract

A study on tick-borne rickettsiosis was developed in the county of Santa
Cruz do Escalvado, State of Minas Gerais, Brazil, where a clinical case of
the disease, confirmed by necropsy, had been reported. Of the 1,254 ticks
collected, 1,061 belonged to the Amblyomma genus, 57 to the Rhipicephalus
sanguineus species, 81 to Boophilus microplus, and 46 to Anocentor nitens.
The hemolymph test associated with Gimenez staining showed that 18 of the
221 A. cajennense specimens, 1 of the 16 R. sanguineus, 1 of the 22 B.
microplus, 3 of the A. nitens, and 1 of the A. ovale contained
rickettsia-like microorganisms. Only 3 A. cajennense ticks were positive
under direct immunofluorescence. A. cajennense was the only species found
on humans.

Keywords
spotted fever - ticks - hemolymph test - Brazil

 
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