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Meet the menagerie in your mouth

点击量:   时间:2019-03-07 02:11:02

THERE may be many more strains of bacteria lurking in the human mouth than anyone imagined, say microbiologists in California. Researchers hunting for mouth bacteria usually just culture gum scrapings, but David Relman and his colleagues at Stanford University used DNA-based techniques to find bacteria that might not grow well in the lab. They discovered 31 bacteria in the mouth of one man that were significantly different from any of the 500 strains previously described (Proceedings of the National Academy of Sciences, vol 96,