HISTORY AND DISTRIBUTION
Verruca peruana, or Carrion's disease, is an infectious disease endemic in certain districts in Peru. It is characterized by fever, rheumatoid pains, anemia and an eruption which develops into bleeding, warty tumors, Verrugas, to use the Spanish term, caused many deaths among the ancient Peruvians and among the followers of Pizarro during the conquest of Peru.Various writers of that country, since 1730, have described the disease, but it was brought into greatest prominence in 1870 during the construction of the Oroya Railroad over the Andes mountains. Many of the foreign laborers were attacked by a strange and fatal disease which was given the name of Oroya fever and the connection of this fever with the external eruption, previously known as "verrugas," was established during this period. Their unity was illustrated by the case of Wilson, a mining engineer, who after an attack of Oroya fever returned