Summit Therapeutics plc, a biopharmaceutical company, discovers, develops, and commercializes medicines to treat infectious diseases in the United States, Latin America, and Europe. It conducts clinical programs focusing on the Clostridium difficile infection (CDI). The company’s lead product candidate is ridinilazole, an orally administered small molecule antibiotic that is in Phase III clinical trials for the treatment of CDI. It also offers SMT-571, a preclinical stage candidate to treat infection caused by the bacteria Neisseria gonorrhoeae through Discuva platform.