Novel Chemically Modified Liquid Medium That Will Support the Growth of Seven Bartonella Species

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Abstract
Bacteria of the genus Bartonella, a member of the Alphaproteobacteria, are fastidious, gram-negative, aerobic bacilli that comprise numerous species, subspecies, and subtypes. In human and veterinary medicine, species isolation remains a vital component of the diagnostic and therapeutic management of Bartonella infection. We describe a novel, chemically modified, insect-based liquid culture medium that supports the growth of at least seven Bartonella species. This medium will also support cocultures consisting of different Bartonella species, and it facilitated the primary isolation of Bartonella henselae from blood and aqueous fluid of naturally infected cats. This liquid growth medium may provide an advantage over conventional direct blood agar plating for the diagnostic confirmation of bartonellosis.