Isolation and Short-Term Persistence of Ehrlichia ewingii in Cell Culture
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Isolation and Short-Term Persistence of Ehrlichia ewingii in Cell Culture
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  • Alternative Title:
    Vector Borne Zoonotic Dis
  • Description:
    Ehrlichia ewingii is the causative agent of human and canine granulocytic ehrlichiosis. Since its discovery in 1970, little work has been done to characterize the pathogen or study the transmission dynamics due to the inability to grow the agent in vitro. The aim of this study was to assess the suitability of multiple cell lines and media formulations for propagation of E. ewingii in cell culture. In this study, we present an overview of attempts to isolate E. ewingii from the buffy coat of goats naturally infected by Amblyomma americanum ticks, as well as a methodology for maintaining the pathogen for up to 16 weeks in culture. The most promising results were seen with HL-60 cells differentiated by the addition of 1.5% DMSO to the media and supplemented with 8 mM l-glutamine. Cultures were passaged multiple times, and fluorescence and morulae were observed by indirect fluorescent antibody test and Diff-Quik staining. It is our hope that this information will provide a foundation for future attempts to propagate and maintain E. ewingii in cell culture.
  • Pubmed ID:
    27228133
  • Pubmed Central ID:
    PMC5672333
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