Tuberculosis strains in the New World today are closely related to European forms, implying an introduction after Spanish contact. However, a group of researchers, among them Johannes Krause, found characteristic changes in skeletons and mummies over one thousand years old from both North and South America. These findings (now published in Nature) suggest that the disease was present for hundreds of years before European contact, likely being brought to the Americas by seals. Read the press release (University of Tuebingen) here.
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