Rib-X Pharmaceuticals (New Haven, CT) a clinical-stage small molecule drug discovery company developing antiinfectives against community acquired pneumonia, chronic bronchitis and complicated skin infections, closed a $20M Series E financing. Participants have included Warburg Pincus, ABS Ventures, Axiom Ventures, EuclidSR Partners, MedImmune Ventures, Oxford Bioscience Partners, SR One and Vox Equity Partners.

Tetraphase Pharmaceuticals (Watertown, MA) a clinical-stage biopharmaceutical company focused on broad spectrum antibiotics for the treatment of gram negative pathogens, unrinary tract infections and community acquired bacterial pneumonia, closed a $45M Series C financing. Participants include Excel Venture Management, CMEA Capital, Fidelity Biosciences, Flagship Ventures, Mediphase Venture Partners and Skyline Ventures.

Kenta Biotech (Switzerland) clinical-stage developer of antibacterial and antiviral antibodies targeting Pseudomonas aeruginosa caused nosocomial pneumonia closed a $10M Series B financing. Participants in this round have not been identified.

Rib-X Pharmaceuticals (New Haven, CT) a clinical-stage small molecule drug discovery company developing antiinfectives against community acquired pneumonia, chronic bronchitis and complicated skin infections, closed a $25M Series D financing. Participants include Warburg Pincus, ABS Ventures, Axiom Ventures, EuclidSR Partners, MedImmune Ventures, Oxford Bioscience Partners, SR One and Vox Equity Partners.