[genus of gram negative bacteria characteristically appearing in chains of several segmenting organisms; occurs in man and arthropod vectors; etiologic agent of human bartonellosis, bacillary angiomatosis, trench fever and cat scratch disease; the genus Rochalimaea, once considered a separate genus, has been combined with the genus Bartonella as a result of high levels of relatedness. ( CSP )]
UMLS (CSP) C0004770