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Related Experiment Videos

Bartonella koehlerae sp. nov., isolated from cats.

S Droz1, B Chi, E Horn

  • 1Institute for Medical Microbiology, University of Berne, CH-3010 Berne, Switzerland. sara.droz@imm.unibe.ch

Journal of Clinical Microbiology
|March 13, 1999
PubMed
Summary

Two novel Bartonella isolates from cats in San Francisco represent a new species, Bartonella koehlerae. These distinct feline Bartonella strains were identified through phenotypic and genotypic analysis, including DNA reassociation and 16S rRNA sequencing.

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Area of Science:

  • Veterinary Microbiology
  • Bacteriology
  • Genomics

Background:

  • Prevalence studies of Bartonella henselae bacteremia in domestic cats are crucial for understanding feline and zoonotic disease transmission.
  • Previous research has primarily focused on known Bartonella species, leaving potential novel strains unidentified.

Purpose of the Study:

  • To characterize two unique Bartonella isolates (C-29 and C-30) from domestic cats in the San Francisco Bay region.
  • To determine if these isolates represent a new species within the Bartonella genus based on phenotypic and genotypic differences.

Main Methods:

  • Phenotypic characterization including growth on selective media (chocolate agar, heart infusion agar with rabbit blood).
  • Genotypic analysis using citrate synthase PCR-restriction fragment length polymorphism (RFLP) and genomic RFLP.

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  • DNA reassociation studies under varying conditions (optimal, stringent).
  • 16S rRNA gene sequencing for phylogenetic analysis.

    • Main Results:

    • Isolates C-29 and C-30 exhibited distinct growth characteristics compared to known Bartonella henselae.
    • PCR-RFLP and genomic RFLP patterns for C-29 and C-30 differed significantly from the B. henselae type strain.
    • DNA reassociation revealed high relatedness between C-29 and C-30 (97-100%) but low relatedness to the B. henselae type strain (31-65%).
    • 16S rRNA gene sequence homology between strain C-29 and the B. henselae type strain was 99.54%.

    Conclusions:

    • The phenotypic and genotypic data strongly support the designation of isolates C-29 and C-30 as a new Bartonella species.
    • The proposed name for this new species is Bartonella koehlerae, with strain C-29 (ATCC 700693) as the type strain.
    • This finding expands the known diversity of Bartonella species in domestic cats and has implications for feline and potentially human health.