Daniel Alcides Carrión, in 1885, infected himself from the pus in the purple wart (verruga peruana) of a female patient. Carrión developed an acute form of bartonellosis now known as Carrion's disease or Oroya fever. This is a rare disease found only in Peru and certain other parts of South America. He kept detailed notes of his condition and succeeded in showing through this self-experiment that the chronic and acute forms were the same disease. He died from the disease after several weeks. A student who had assisted Carrion in carrying out this work was arrested and charged with murder, but later released.