Juan Jos Montes de Oca was born in Buenos Aires, Argentina, May 6, 1806, son of Eusebio and Montes de Oca del Aguila and Juana Ventura Rodriguez Cabral. In 1822 he joined the inaugural course at the newly opened College, where she quickly showed great aptitude for the study of anatomy and practice surgery. During his student days was a member along with a group of fifteen classmates Elemental Medical Society, founded in 1824 and chaired by Diego Alcorta. In February 1826, during the war with Brazil, was appointed director of the School anatomical and months later, with only twenty, was temporarily in charge of the Chair of Anatomy, under the supervision of Professor of Surgical Pathology, by the resignation of Francisco Cosme Argerich holder. The following year he received his doctorate as the best student in his class with a thesis on Cholera morbus. In 1828 he was appointed to the chair of the anatomy and physiology.He taught in a practical way over corpses and the expertise that was demonstrated in the dissection reputation as a surgeon. On 12 March of that year he married Josefa Rodriguez Raymunda Palavecino (1863-1869), daughter of Spanish Manuel Rodriguez and the Buenos Aires Mamerto Ana Lorenza Palavecino and Gregoria Aguilar. While Montes de Oca had no political activity, their friendships and sympathizers were active in the Unitarian party, so to gain power after Juan Manuel de Rosas in 1835 was separated from his academic positions and as General Hospital Medical Men. He was jailed in February 1839 but shortly thereafter was allowed to emigrate. While embarked for France, calling at Montevideo preferred to remain there, one of the main havens of Argentine exiles for political reasons. In that city he served as Professor of Medicine and Surgery and a surgeon at hospitals in blood during the siege of Montevideo.Impoverished, he was forced to emigrate to the island of Santa Catarina, Brazil, where he practiced until moving to Rio de Janeiro. In Rio quickly acquired reputation as a surgeon and served effectively in the fight against yellow fever epidemic that swept the city since 1849. Fearing the spread to Rio de La Plata wrote a paper on the prevention and hygiene measures necessary to prevent the epidemic, which was authorized for publication in the city of Buenos Aires. Montes de Oca returned to his hometown after the fall of Rosas. It became the main organizer of the medical school, basis for future medical school. In Buenos Aires cultivated the friendship of General Bartolom Miter. On June 2, 1853 Miter received a gunshot wound to the forehead, although it was muffled, causing fracture of the frontal and forced surgery to remove bone fragments.Montes de Oca, near the Dr.Ireneo Portela, Pedro Ortiz Velez (nephew of Dalmacio V lez S rsfield Almeyda and Hilario saved his life. In 1858 he launched the first alarm of the arrival in Buenos Aires in the first invasion of fever yellow, to verify a patient’s symptoms had already observed in Rio de Janeiro. Disseminated in Argentina the use of general anesthesia chloroform, which had employed in Brazil. In 1862 became President of the Faculty of Medicine, being re-elected five consecutive times until his retirement from teaching in 1873. In this position created the Museum of Pathology and the Faculty Library, which after his death were named. During the War of the Triple Alliance with the army went to Paraguay. The epidemic 1867 global cholera struck the army and arrived in Buenos Aires in April of that year. The Public Health Commission was directed by Dr.Leopoldo Montes de Oca, son of Juan Jos Montes de Oca, then Director of the Military Hospital and Retirement Medical School, who created in a leper Miserere pens of 40 beds would take the name of San Roque. For fourteen years he exercised legislative functions in the Chamber of Deputies and Senate of the Province of Buenos Aires, an institution that came to preside. Juan Jos Montes de Oca victim died of aggravation of a chronic heart condition and Bronchopulmonary in Buenos Aires on 22 February 1876, shortly before his 70th birthday. He was shrouded as they wish, with the robe he wore in the hospital. Nicol s Avellaneda, President, accompanied the funeral.He had numerous children: Anastasia, Domingo and Trinidad, who died infants, and Juan Jos (1830-1903), doctors Manuel Augusto (1832-1882) and Leopold (1833-1906), Irene Eugenia (1836, married Varela Dr.Mariano with Cane), Jos Octavio (1837), Alejandro (1837), Romulo (1842-1882), Julio Guillermo (1844), Luisa Montes de Oca Rodr guez Etelvina Palavecino (1854).