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Actionable news in TTPH: Tetraphase Pharmaceuticals, Inc.,

Tetraphase's antibiotic succeeds late-stage study, shares soar

(Reuters) - Tetraphase Pharmaceuticals Inc said its lead experimental antibiotic for serious bacterial infections met the main goal in a late-stage study, sending its shares surging nearly 23 percent in after-market trading on Tuesday.

The company said the antibiotic, eravacycline, was being studied in a pivotal 500 patient late-stage study...