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Slide 38 of 56
Helicobacter pylori, a chronic gastric pathogen of human beings, can
be found in virtually every human population group. Variations of the bacteria
can be divided into seven populations and subpopulations with distinct
geographical distributions. Analysis of these bacteria within native populations
worldwide reveals that the East Asian strain of Helicobacter pylori can
be isolated from Native Americans, indicating that East Asians are the likely
ancestor of Native Americans.1
References 
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Falush D, Wirth T, Linz B, Pritchard
JK, Stephens M, Kidd M, Blaser MJ,
Graham DY, Vacher S, Perez-Perez GI, Yamaoka Y, Megraud F, Otto K, Reichard U,
Katzowitsch E, Wang X, Achtman M, Suerbaum S. 2003. Traces of human migrations
in Helicobacter pylori populations. Science
299: 1528-1529.
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