EXHIBIT 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We hereby consent to the use in this Amendment No. 1 to the Registration Statement on Form S-1 of Seres Therapeutics, Inc., formerly known as Seres Health, Inc., of our report dated April 8, 2015 relating to the consolidated financial statements of Seres Therapeutics, Inc., formerly known as Seres Health, Inc., which appears in such Registration Statement. We also consent to the reference to us under the heading “Experts” in such Registration Statement.
/s/ PricewaterhouseCoopers LLP
Boston, Massachusetts
June 16, 2015
