Seroepidemiological survey of Rickettsia spp. in dogs from the endemic area of Rickettsia parkeri rickettsiosis in Uruguay

Acta Tropica
Paula LadoJosé M Venzal

Abstract

Rickettsia parkeri rickettsiosis is a vector-borne zoonosis that occurs in some countries of the American continent. Following the first description and determination of the pathogenicity to humans in 2004 in USA, this bacterium has been reported in several South American countries. Human cases have been diagnosed in both Uruguay and Argentina in the past years. This study consisted in a serosurvey of 1000 domestic dogs living in the endemic area of rickettsiosis in Uruguay, where Amblyomma triste is the tick vector. Sera were analyzed by Indirect Immunofluorescence Assay (IFA), against antigens of three different rickettsial species: R. rhipicephali, R. felis and R. parkeri. It was determined that 20.3% of the dogs had antibodies that reacted to at least one of the three species tested, taking as cut off ≥64 titers. Furthermore, 140 of the seropositive dogs (14%) had a titer at least 4 times higher to R. parkeri than those of any of the other species, thus, it was considered that the immune response was stimulated by that species in particular. This is the first serological survey in primary hosts for adults of A. triste in Uruguay, and therefore the first prevalence values are reported. Adult A. triste ticks collected from th...Continue Reading

References

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Citations

Mar 21, 2016·Ticks and Tick-borne Diseases·Andrés Moreira-SotoAdriana Troyo
Apr 19, 2016·Emerging Infectious Diseases·Kristen L HerrickChristopher D Paddock
Mar 29, 2019·Parasites & Vectors·Ricardo G Maggi, Friederike Krämer
Nov 10, 2017·Transboundary and Emerging Diseases·B Dall'AgnolJ Reck

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