This Week in Science

An international team led by investigators at the University of Michigan Medical School reports on its study of how germ-free mice "are unable to eradicate Citrobacter rodentium, a model for human infections." These results, the team says in a paper published online in advance this week, suggest that "pathogen colonization is controlled by bacterial virulence and through competition with metabolically related commensals."

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A new report highlights the potential threats posed by advances in synthetic biology, NPR reports.

A Bloomberg reporter tried to get her genetic data deleted, but found it's not so simple to do.

Johns Hopkins University's Steven Salzberg and his colleagues have come up with a new estimate for the number of human genes, Nature News reports.

In Genome Research this week: study of intra-tumor heterogeneity, workflow resources for EPIGEN-Brazil, and more.