`We may not be entirely human, gene experts said on Thursday after studying the DNA of hundreds of different kinds of bacteria in the human gut.
Bacteria are so important to key functions such as digestion and the immune system that we may be truly symbiotic organisms — relying on one another for life itself, the scientists write in Friday’s issue of the journal Science. [..]
“We are somehow like an amalgam, a mix of bacteria and human cells. There are some estimates that say 90 percent of the cells on our body are actually bacteria,” Steven Gill, a molecular biologist formerly at TIGR and now at the State University of New York in Buffalo, said in a telephone interview.’