Bartonellosis is an infectious disease produced by bacteria of the genus Bartonella.Bartonella species cause diseases such as Carrion´s disease, trench fever, and cat scratch disease, and other recognized diseases, such as bacillary angiomatosis, peliosis hepatis, chronic bacteremia, endocarditis, chronic lymphadenopathy, and neurological disorders.
While some authorities recommend the use of azithromycin, it's difficult to gauge what, if any significant benefit, is afforded given the often self-limiting course in patients with intact immune function.
The disease was named after a medical student Daniel Alcides Carrión from Cerro de Pasco, Peru. Carrion described the disease after being inoculated on his request by Doctor Evaristo M. Chávez, a close friend and coworker in Dos de Mayo National Hospital. Carrion kept a meticulous clinical history until the disease rendered him incapable of so doing. Carrion proved that "Oroya fever" and "Verruga Peruana" were two stages of the same disease, not two different ones as thought at the time.

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