Human Migrations
Posted: 08 February 2007 09:40 PM   [ Ignore ]
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About 60,000 years ago anatomically modern humans began to move out of Africa and eventually populated the continents of Eurasia and Australia. New genetic evidence confirms that this migration actually happened.

These humans carried with them the bacteria Helicobacter pylori.  An international team of microbiologists has traced the origin of the bacteria in modern humans. 520 strains of H. pylori were collected from 51 ethnic groups. Researchers then sequenced seven gene fragments from the DNA of the bacteria. They then sorted out the strains into clusters that showed their genetic and geographic patterns. They found that people from east Africa had the most
kinds of H. pylori suggesting that the bacteria arose in humans in east Africa.

The researchers date the spread of H. pylori to about 60,000 years ago—however, some think it may have been earlier. And it is possible that there was more than one migration. But their findings are consistent with other genetic evidence that modern humans originated in Africa.

Bob Reasoner

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Posted: 09 February 2007 02:53 AM   [ Ignore ]   [ # 1 ]
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Plus think of all those ulcers. Since when tested last year for the H. Pylori I came up negative, does that mean I am not genetically linked to these humans?

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Posted: 09 February 2007 03:05 AM   [ Ignore ]   [ # 2 ]
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[quote author=“cgallaga”]Plus think of all those ulcers. Since when tested last year for the H. Pylori I came up negative, does that mean I am not genetically linked to these humans?

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cgallaga,

I guess it’s possible but I really don’t know.

Bob Reasoner

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Posted: 09 February 2007 03:42 AM   [ Ignore ]   [ # 3 ]
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[quote author=“cgallaga”]Plus think of all those ulcers. Since when tested last year for the H. Pylori I came up negative, does that mean I am not genetically linked to these humans?

I’m not familiar with the research that Bob is citing, however I think I can understand what they’re after ... they are using the H.Pylori as a genetic marker.

I believe that this bacteria lives exclusively in the human gut. So it becomes an indirect marker for human migration patterns.

If that’s correct, then the fact that you apparently don’t have any H. Pylori is not relevant to your genetic linkage to these humans (you would be linked), however you would not have been a useful subject for the experiment.

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Doug

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El sueño de la razón produce monstruos

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