Intestinal Microbial Flora

First

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

1. 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.