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How gut flora came to be?

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How gut flora came to be?

Postby tiny101 » Tue Jun 29, 2010 3:49 am

Hi there,

I am wondering how intestinal bacteria came to exist (in humans, or any species for that matter). Many articles discuss the evolutionary pressures that play a part in the development of gut flora, but never suggest any theories as to how they first came to be.

Any help would be much appreciated. Thanks in advance!
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Postby canalon » Tue Jun 29, 2010 4:30 am

From a newborn, they start from their mom: The birth canal is not sterile. Then, as neither is their food, it keeps being enriched that way.

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Postby mith » Tue Jun 29, 2010 7:11 pm

probably has to do with their playing nice with the immune system.
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Postby Darby » Thu Jul 01, 2010 2:38 am

Symbionts are common in many, many animals, so the basic relationship is ancient.
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