The supply chain for Seres Therapeutics Inc.’s oral microbiome therapeutic Vowst, formerly known as SER-109, to prevent recurrent Clostridium difficile infection (rCDI) is “well-established,” said David Arkowitz, the firm’s chief financial officer and head of business development. “It’s the same supply chain that we used for phase III [trials], and we’ve been manufacturing product for launch for some time.” Arkowitz spoke during a conference call with investors April 27, regarding the previous day’s U.S. FDA go-ahead for Vowst, cleared for adults with rCDI, including first recurrence following antibacterial therapy.

As expected, Seres Therapeutics Inc. gained U.S. FDA approval of the BLA for the oral microbiome therapeutic Vowst, formerly known as SER-109, for prevention of recurrent Clostridium difficile infection (rCDI), accepted for priority review in October of 2022 without an advisory committee meeting.

Unveiling further positive data for SER-109 in preventing recurrent Clostridium difficile infection at Digestive Disease Week (DDW) over the weekend, Seres Therapeutics Inc. reiterated plans to file a BLA with the U.S. FDA in mid-2022. Should the FDA accept the application and grant priority review – SER-109 has breakthrough and orphan status – the medicine could be the first microbiome-based therapy to reach the market.

Mark Wilcox, professor of medical microbiology at the University of Leeds, said Seres Therapeutics Inc.’s top-line phase III data with oral microbiome therapeutic SER-109 against recurrent Clostridium difficile infection (CDI) are “about as good as it gets” in the tough-to-treat patient population.