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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 108, No. 1, 2013, pp. 123-125
Bioline Code: oc13022
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 108, No. 1, 2013, pp. 123-125

 en Molecular identification of Rickettsia parkeri check for this species in other resources infecting Amblyomma triste check for this species in other resources ticks in an area of Argentina where cases of rickettsiosis were diagnosed
Cicuttin, Gabriel & Nava, Santiago

Abstract

Specimens of the hard tick Amblyomma triste check for this species in other resources were found infected with Rickettsia parkeri check for this species in other resources in an area of Argentina (General Lavalle, Buenos Aires Province) where cases of human illness attributed to this microorganism have been reported. Molecular detection of R. parkeri was based on polymerase chain reactions that amplify a ca. 400-bp fragment of the 23S-5S intergenic spacer and a ca. 500-bp fragment of the gene encoding a 190-kDa outer membrane protein. Three (6.97%) of 43 A. triste ticks were determined to be positive for R. parkeri. These results provide strong evidence that A. triste is the vector of R. parkeri in the study area. The findings of this work have epidemiological relevance because human parasitism by A. triste ticks has been frequently recorded in some riparian areas of Argentina and Uruguay and new cases of R. parkeri rickettsiosis might arise in the South American localities where humans are exposed to the bites of this tick species.

Keywords
Rickettsia parkeri - Amblyomma triste - Argentina

 
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