CONICET | Buscador de Institutos y Recursos Humanos

Amblyomma triste (Acari: Ixodidae) is a tick distributed in the Neotropical and Nearctic regions, but most records are from South America. In Argentina,(Acari: Ixodidae) is a tick distributed in the Neotropical and Nearctic regions, but most records are from South America. In Argentina, A. triste became a tick of public health relevance because of the finding of specimens infected with Rickettsia parkeri and the recently reported clinical cases of rickettsiosis in humans with a history of tick bites in localities where A. triste prevails. Romer et al. (2011) identified R. parkeri DNA in cutaneous lesions in two of the clinical cases documented in the Paraná River Delta region. Rickettsia parkeri was previously isolated from A. triste in Uruguay and Brazil. In Uruguay, human disease allegedly caused by R. parkeri has been recurrently reported since 1990 but it was not until recently that a case of R. parkeribecame a tick of public health relevance because of the finding of specimens infected with Rickettsia parkeri and the recently reported clinical cases of rickettsiosis in humans with a history of tick bites in localities where A. triste prevails. Romer et al. (2011) identified R. parkeri DNA in cutaneous lesions in two of the clinical cases documented in the Paraná River Delta region. Rickettsia parkeri was previously isolated from A. triste in Uruguay and Brazil. In Uruguay, human disease allegedly caused by R. parkeri has been recurrently reported since 1990 but it was not until recently that a case of R. parkeriRickettsia parkeri and the recently reported clinical cases of rickettsiosis in humans with a history of tick bites in localities where A. triste prevails. Romer et al. (2011) identified R. parkeri DNA in cutaneous lesions in two of the clinical cases documented in the Paraná River Delta region. Rickettsia parkeri was previously isolated from A. triste in Uruguay and Brazil. In Uruguay, human disease allegedly caused by R. parkeri has been recurrently reported since 1990 but it was not until recently that a case of R. parkeriA. triste prevails. Romer et al. (2011) identified R. parkeri DNA in cutaneous lesions in two of the clinical cases documented in the Paraná River Delta region. Rickettsia parkeri was previously isolated from A. triste in Uruguay and Brazil. In Uruguay, human disease allegedly caused by R. parkeri has been recurrently reported since 1990 but it was not until recently that a case of R. parkeriR. parkeri DNA in cutaneous lesions in two of the clinical cases documented in the Paraná River Delta region. Rickettsia parkeri was previously isolated from A. triste in Uruguay and Brazil. In Uruguay, human disease allegedly caused by R. parkeri has been recurrently reported since 1990 but it was not until recently that a case of R. parkeriRickettsia parkeri was previously isolated from A. triste in Uruguay and Brazil. In Uruguay, human disease allegedly caused by R. parkeri has been recurrently reported since 1990 but it was not until recently that a case of R. parkeriR. parkeri has been recurrently reported since 1990 but it was not until recently that a case of R. parkeriR. parkeri infection in a human was confirmed. In Brazil, surprisingly, not a single human case of rickettsiosis associated with A. triste bite has been reported so far. However and notwithstanding all the information available about the distribution of this bacterium, there are no previous reports inquiring about the infection levels of R. parkeri in naturally infected A. triste ticks.A. triste bite has been reported so far. However and notwithstanding all the information available about the distribution of this bacterium, there are no previous reports inquiring about the infection levels of R. parkeri in naturally infected A. triste ticks.R. parkeri in naturally infected A. triste ticks.A. triste ticks.