Consent of Independent Registered Public Accounting Firm


Synthetic Biologics, Inc.

Rockville, Maryland


We hereby consent to the incorporation by reference in the Prospectus constituting a part of this Registration Statement on Form S-3 of our reports dated February 22, 2018, relating to the consolidated financial statements and the effectiveness of Synthetic Biologics, Inc.’s internal control over financial reporting, appearing in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017. Our report contains an explanatory paragraph regarding the Company’s ability to continue as a going concern.


We also consent to the reference to us under the caption “Experts” in the Prospectus.


/s/ BDO USA, LLP  
McLean, Virginia  
August 1, 2018