Exhibit 23.3
Consent
of Independent Registered Public Accounting Firm
Navidea
Biopharmaceuticals, Inc.
Dublin,
Ohio
We
hereby consent to the incorporation by reference in this
Registration Statement on Form S-8, of our report dated March 23,
2016, relating to the consolidated financial statements of Navidea
Biopharmaceuticals, Inc., appearing in the Company’s Annual
Report on Form 10-K for the year ended December 31,
2016.
/s/ BDO USA, LLP
Chicago,
Illinois
May 9,
2017