Helicobacter pylori
Study Contradicts Assumption that Ulcer Bug Has Always Plagued Humans
Published in Health and Medicine Week, May 22nd, 2000
Comparing pieces of DNA from Helicobacter pylori, scientists discovered that strains from Peru resemble those from Spain and not those from eastern Asia.
"My favorite interpretation of this finding is that the Spanish brought H. pylori to Peru when they conquered the Incan empire nearly 500 years ago and that the bacterium was not present in the ancestors who crossed the Bering Strait from Asia more than 10,000 years ago," says Douglas E. Berg, PhD, the Alumni Professor of Molecular Microbiology...
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