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They're not as ubiquitous as blood or sperm banks, but another kind of biological substance also sits in cold storage ready to treat desperately ill or…
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Infections with C. difficile are a big problem for people in hospitals and nursing homes. An experimental treatment with spores from a harmless version of the bacterium prevented new infections.
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When an especially nasty intestinal bug threatened 86-year-old Billie Iverson, an unusual transplant saved her. The medical solution, still experimental, was to replace her dangerous digestive bacteria with a healthier mix of microbes.