Humans are hosts to trillions of microbes, most of which are harmless or even beneficial. But a new study shows how one bacterium traveled from humans to farm animals and back to humans, developing resistance to antibiotics along the way. Identifying the evolutionary processes of disease agents that transfer between species may help scientists determine how to prevent and treat emerging diseases.
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What new piece of information did scientists discover?
What do scientists infer based on this discovery?
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