Early Life
Chagas was the son of José Justiniano das Chagas, a coffee farmer from Minas Gerais, and Mariana Cândida Chagas. After his secondary studies at Itu, São Paulo and São João del Rei, he enrolled in the School of Mining Engineering at Ouro Preto, but changed to the Medical School of Rio de Janeiro in 1897, influenced by his uncle, who was a physician and owner of a hospital at that city. He graduated in 1902 and got his M.D. in the following year with a thesis on the hematology of malaria, working at the new medical research institute created by noted physician and, later, friend and colleague, Oswaldo Cruz (1872–1917).
After a brief stint as a medical practitioner in the hinterlands, Chagas accepted a position in the port authority of Santos, São Paulo, with the mission of fighting the malaria epidemic which was affecting its workers. There he introduced an innovation, which consisted in using pyrethrum, an insecticide, to disinfect households, with surprising success. His published work on this method served as the basis of prevention of malaria all over the world and was adopted by a service of the Ministry of Health in Brazil which was established expressly for this purpose.
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