article_snippet.sent: As part of their 2009 visit to this previously uncontacted Yanomami village, medical professionals collected samples from the skin, mouths and fecal matter of 34 of the 54 villagers before vaccines or antibiotics were administered.
article_snippet.sent: samples were frozen until DNA extraction and bacterial culturing could be performed for the purposes of this study.
article_snippet.sent: Thousands of blood samples have been returned to the Yanomami tribe in Brazil, after Thousands of blood samples were taken by American scientists in the 1960s and held in U.S. academic institutions without the Yanomami tribe in Brazil's consent, according to Survival international.
article_snippet.sent: Keen to collect blood samples from a very isolated community, U.S. scientists collected thousands of samples from the Indians in Brazil and Venezuela without obtaining thousands of samples from the Indians in Brazil and Venezuela informed consent.
article_snippet.sent: Without obtaining Yanomami indigenous leader Davi Yanomami's consent, some institutions extracted DNA from their blood for genetic tests in the 1990s.
article_snippet.sent: Back in labs in the U.S. (at Mount Sinai, New York University, University of Colorado, Boulder and others), researchers sequenced DNA isolated from the Yanomami samples.