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Daniel A. Carrion was born in Chaupimarca-Peru in 1858. He was a medical student from the only medical school of medicine, San Fernando-San Marcos University, in that time.

In 1870 began the construction of the train between Lima-La Oroya. Several foreign workers were doing different labors of construction when a disease characterized by fever and anemia began to kill them. Thousands of workers died with the disease which received the name of Oroya’s fever.

In that time, other interesting disease: Peruvian wart attracted the attention of medical students and professors.

In 1885 Evaristo Chavez, was asked by Carrion to do an inoculation on him, from the secretion of a wart from a patient with Peruvian wart. After 21 days of the inoculation, he showed no sign of warts but he began to suffer the first symptoms of Oroya’s fever: fever and anemia. The October 5th of 1885 Carrion died. He claimed that both diseases had the sameorigin. In few years, Carrion was recognized like a martyr of peruvian medicine and the term Carrion’s disease was used until our times.

In 1909 Alberto L. Barton, announced the discovery of the etiologic agent (Barton bacillus) which was called Bartonella bacilliformis.