Carrion's disease or Bartonellosis is an infectious disease produced by Bartonella bacilliformis. The organism is transmitted by the bite of the sand fly, especially Lutzomia verrucarum. The clinical symptoms of bartonellosis are pleomorphic and some patients from endemic areas may be asymptomatic. The two classical clinical presentations are the acute phase and the chronic phase, corresponding to the two different host cell types invaded by the bacterium (red blood cells and endothelial cells).
Statistical analysis of Carrion's disease shows that the prevalance is 0% in Argentina and it is having more prevalance in some ares Peru and Colombia.
Recent investigations show that Candidatus Bartonella ancashi may cause verruga peruana, although it may not meet all of Koch's postulates. Carrion's disease is found only in Peru, Ecuador, and Colombia. It is endemic in some areas of Peru.