NEW YORK (GenomeWeb) - Goldman Sachs on Wednesday downgraded shares of Myriad Genetics to a Sell rating and Exact Sciences to Neutral, while upgrading Alere to Neutral.

The bank maintained its stock ratings for Hologic, Cepheid, and T2 Biosystems.

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US News & World Report writes that genetic testing of lung tumors can help identify treatments for patients.

A team of researchers plans to sample Loch Ness for environmental DNA, according to Newsweek.

The New York Times writes about the appearance of mosaicism in healthy people.

In PNAS this week: insecticide resistance patterns Anopheles gambiae mosquito, transcriptome patterns in Pseudomonas aeruginosa during infection, and more.