Tetraphase Pharmaceuticals, Inc. announced the appointment of Jacques Dumas, Ph.D. as Chief Scientific Officer. Dr. Dumas joins Tetraphase from Merck Research Laboratories where he served as Vice President, Idenix, related to his prior role as Chief Scientific Officer at Idenix Pharmaceuticals. From 2007 to 2014, Jacques worked for AstraZeneca, most recently as Vice President and Head of Strategy, Infection Innovative Medicines.