Researchers from Norway and the UK retraced the history of an extensively drug-resistant case of Mycobacterium tuberculosis that cropped up in a single individual. By sequencing nine samples collected from the individual over three-and-a-half years, the team identified several M. tuberculosis lineages that appeared to compete with and replace one another following exposure to various tuberculosis treatments.

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Dog DNA testing finds that some purebreds might not truly be purebreds, Inside Edition reports.

Mary Beckerle has returned as director of the Huntsman Cancer Institute, according to ScienceInsider.

Smithsonian Magazine reports that environmental DNA sampling can be used to track elusive organisms.

In Genome Research this week: repetitive satellite DNA in the fruit fly, transcriptome map assembly pipeline, and more.