Medical Definition of bartonellosis
: a disease or infection caused by bacteria of the genus Bartonella; specifically : a disease of mammals including humans that occurs in South America, is characterized by severe anemia and high fever followed by an eruption like warts on the skin, and is caused by a bacterium of the genus Bartonella (B. bacilliformis) that invades the red blood cells and is transmitted by sand flies (genus Phlebotomus)—called also Carrión's disease; see oroya fever, verruga peruana
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