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段落1

This is Scientific American 60-Second Science. I'm Christopher Intagliata. Got a minute?

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Most E.coli bacteria are harmless.

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It's the rare, pathogenic strains that can cause bloody diarrhea, kidney disease, or death.

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But many of us may already be carrying the antidote, a healthy colony of gut bacteria.

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Because a study finds that when bad E.coli get in, beneficial microbes appear to keep them at bay.

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In mice, at least.

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Researchers raised rodents in a sterile environment, meaning the animals are bacteria-free.

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Then some were inoculated with a probiotic cocktail of human gut bacteria.

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After that they all got a dose of pathogenic E.coli, the strain behind last year's spinach outbreak.

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The mice who got the preemptive probiotics never got sick.

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Their gut bacteria appeared to whisk away the toxins produced by E.coli.

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Their probiotic-free counterparts were less lucky.

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Within a week of being infected with the pathogen they got kidney disease.

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The researchers presented those findings at a meeting of the American Society for Microbiology, in Denver.

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So it's possible antibiotics could be joined by probiotics as future treatments for bacterial infections.

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And that you may already be enlisting gut bacteria to fight off E.coli infections.

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Call it a gut feeling.

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Thanks for the minute, for Scientific American 60-Second Science. I'm Christopher Intagliata.

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