The Human Microbiome: Guts And Glory We truly are legion. Trillions of bacteria, viruses, fungi and other microbes dwell in organized communities in and on the nooks and plains of the human body. From birth to death, they shape our health — and not always for the worse.
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The Human Microbiome: Guts And Glory

Trillions of bacteria, virus, fungi and other microbes hiding out in the human body shape health.
Illustration by Benjamin Arthur for NPR

He's not just getting a cold. He's building his microbiome. iStockphoto.com hide caption

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Say hello to your microbiome, Rob Stein. Our intrepid correspondent decided to get his gut bacteria analyzed. Now he's wondering if he needs to eat more garlic and onions. Morgan Walker/NPR hide caption

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Morgan Walker/NPR

Knight (left) and Bucheli take soil samples from beneath one of the decomposing bodies. Katie Hayes Luke for NPR hide caption

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Katie Hayes Luke for NPR

Could Detectives Use Microbes To Solve Murders?

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Billie Iverson, 86, of Cranston, R.I., recently underwent a transplant of intestinal microbes that likely saved her life. Ryan T. Conaty for NPR hide caption

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Ryan T. Conaty for NPR

Microbe Transplants Treat Some Diseases That Drugs Can't Fix

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We may not see them, but we need them. iStockphoto.com hide caption

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It's busy down there: a gut bacterium splits into two, becoming two new cells. Centre For Infections/Science Photo Library/Corbis hide caption

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Centre For Infections/Science Photo Library/Corbis

Bad bug: The bacterium Clostridium difficile kills 14,000 people in the United States each year. Janice Carr/CDC/dapd hide caption

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Janice Carr/CDC/dapd

Sucking may be one of the most beneficial ways to clean a baby's dirty pacifier, a study found iStockphoto.com hide caption

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