Researchers expend powerful genetic techniques to reconstruct disease's route around the world from North AmericaA lethal drug-resistant bug that spread rapidly around the world and killed tens of thousands of people has been traced to hospitals in the US and Canada.
British researchers used powerful genetic techniques to reconstruct Clostridium difficile's route as it circled the globe,and identified four separate waves that brought the bug to Britain. In all but one instance, the pathogen crossed the Atlantic.
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Source: theguardian.com