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Relationship between H. pylori ancestry and human Amerindian ancestry. The proportion of European H. pylori ancestry (AE2) correlates positively and African H. pylori ancestry (AA1) correlates negatively with host Amerindian ancestry. The 90% density ellipses are demarcated by the shaded area in each plot. The wider minor axis of the lower ellipse indicates that AA1 is dispersed more broadly than AE2 in Amerinds. n = 233.
