Chicago: Gut bacteria -- colonies of bacteria that live in the human digestive tract -- appear to have fairly picky dining habits, with one type preferring high-fat, fast-food fare, and another preferring a high-fiber feast, U.S. researchers said on Thursday.Researchers are increasingly trying to understand the interplay of bacteria and their human hosts."We know our human bodies are colonized with tons and tons of bacteria and other organisms. In your colon alone, you have more bacterial cells than you have human cells in your whole body," said Dr. James Lewis, a researcher at the University of Pennsylvania, who worked on the study published in the journal Science.Last April, German researchers reported that gut bacteria fall into three distinct types. Lewis` team wanted to see how these different types of gut bacteria affect human health."The unique feature of the intestines is that they are constantly bathed in what we eat. It seemed logical to us that some of the differences between one person`s gut bacteria and another could be related to what they eat," Lewis said in a telephone interview.To understand that, the team had to sort through a lot of excrement.
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