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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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Wired reports on how genetic genealogy's use in forensics has exploded in the year since an arrest in the Golden State Killer case was made.

Retraction Watch reports that the increase in retracted papers at a journal is due to more resources there to tackle publication ethics.

New York City has settled with a forensic scientist who was fired after questioning a DNA testing approach used by the medical examiner's office, the New York Times reports.

In Nature this week: technique for measuring replication fork movement, WINTHER trial results, and more.