Gut. DOI:10.1136/gutjnl-2016-313413
The body is home to some 100 trillion microbial cells (the microbiota). Indeed, the number of microbial cells on and in the body is about 10 times greater than the number of human cells. A 2010 study published in Nature, for example, estimated that the gastrointestinal tracts of 124 European people harboured between 1000 and 1150 species of bacteria.
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