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 develops DDS-01 series to treat infection caused by the bacteria Neisseria gonorrhoeae through Discuva platform; and DDS-04 series to treat Enterobacteriaceae. The company was formerly known as Summit Corporation plc and changed its name to Summit Therapeutics plc in February 2015. Summit Therapeutics plc was founded in 2003 and is based in Abingdon, the United Kingdom.