File - This September 7, 2012 photo shows a Yanomami boy as he rests , in Amazonas state, southern Venezuela.
AFP PHOTO/LEO RAMIREZ
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Everyone's body is brimming with bacteria, and these microbes do plenty of good things like building the immune system and helping digestion.A study published last week looking at the gut, mouth and skin microbes in people from a small, isolated tribe in southern Venezuela's Amazonian jungles shows just how much modern life may be altering humankind's bodily bacteria.The Yanomami villagers, secluded from the outside world until 2009, possessed the most diverse collection of bacteria ever found in people including some never before detected in humans, said scientists whose research appears in the journal Science Advances.Yanomami were found to have twice the number of microbe varieties of the U.S. subjects and 30 to 40 percent more diversity than the Malawians and Guahibo.
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