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Jekyll and Hyde bacteria aids or kills, depending on chance

EAST LANSING, Mich. — Living in the guts of worms are seemingly innocuous bacteria that contribute to their survival. With a flip of a switch, however, these same bacteria transform from harmless microbes into deadly insecticides. In the current issue of Science, Michigan State University researchers led a study that revealed how a bacteria flips a DNA switch to go from an upstanding community member in the gut microbiome to deadly killer in insect blood.
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