A little bit of spit reveals a lot about what lives in your mouth

Like it or not, your mouth is home to a thriving community of microbial life. More than 600 different species of bacteria reside in this "microbiome," yet everyone hosts a unique set of bugs, and this could have important implications for health and disease. In a study published online in Genome Research, scientists have performed the first global survey of salivary microbes, finding that the oral microbiome of your neighbor is just as different from yours as someone across the globe.

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