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  • Title: Experimental infection of dogs with Bartonella henselae and Bartonella vinsonii subsp. berkhoffii.
    Author: Balakrishnan N, Cherry NA, Linder KE, Pierce E, Sontakke N, Hegarty BC, Bradley JM, Maggi RG, Breitschwerdt EB.
    Journal: Vet Immunol Immunopathol; 2013 Nov 15; 156(1-2):153-8. PubMed ID: 24120155.
    Abstract:
    The lack of a suitable infection model remains an important obstacle for the pathophysiological understanding of Bartonella spp. The following pilot study was designed to determine whether cell culture-grown Bartonella henselae SA2 and Bartonella vinsonii subsp. berkhoffii genotype III would cause persistent bacteremia in dogs. Pre-inoculation screening established that two laboratory-raised Golden retrievers were naturally-infected with Bartonella koehlerae. Despite prior infection, one dog each was inoculated subcutaneously with 5 × 10(4)B. henselae (SA2 strain) or 3 × 10(4)B. vinsonii subsp. berkhoffii genotype III. Dogs were bled weekly for serological testing and culture using Bartonella alpha proteobacteria growth medium (BAPGM) diagnostic platform. Dog 1 seroconverted to B. henselae and Dog 2 seroconverted to B. vinsonii subsp. berkhoffii genotype III. Throughout the study period, Bartonella spp. DNA was neither amplified nor isolated in ante-mortem BAPGM enrichment blood cultures. B. henselae SA2 was isolated from a postmortem bone marrow from Dog 1 and B. koehlerae DNA was amplified from postmortem lung from Dog 2 following BAPGM enrichment culture. Limitations include lack of uninfected controls, a potentially suboptimal B. vinsonii subsp. berkhoffii inoculum and a relatively short duration of study. We conclude that following intradermal infection, sequestration of Bartonella spp. in tissues may limit diagnostic detection of these bacteria in dog blood samples.
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