How are Bartonella (B) species differentiated in cat scratch disease (CSD)?

Updated: Feb 16, 2021
  • Author: Robert A Schwartz, MD, MPH; Chief Editor: Michael Stuart Bronze, MD  more...
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PCR of a biopsy specimen is the most sensitive test and is able to differentiate between different Bartonella species, as well as subspecies and strains. However, this test is not readily available. A presumptive diagnosis of infection with CSD bacilli can be made with Warthin-Starry and Brown-Hopps gram-stained tissues. Immunostaining with BhmAB has been reported to be a better alternative than Warthin-Starry stain in demonstrating the organism. [57]

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