n 1  cap  :  a genus of gram-negative bacteria that is the type genus of the family Bartonellaceae and includes the causative agent (B. bacilliformis) of bartonellosis  2  sometimes cap  :  any bacterium of the genus Bartonella
 
Bar•ton, Alberto L. (b 1874), Peruvian physician. In 1909 Barton published an article on elements found in the red blood cells of patients with Oroya fever. In this article he identified the blood parasite (Bartonella bacilliformis) that is the causative agent of Oroya fever and verruga peruana. The organism is now placed in the genus Bartonella, which was named after him in 1915.
 
 
 
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