The present disclosure relates to antimicrobial agents and methods of using such agents. The disclosure includes antimicrobial agents having broad spectrum antimicrobial activity, nucleic acids and amino acid sequences encoding such antimicrobial agents, as well as methods of using the antimicrobial agents. The antimicrobial agents of the disclosure may be used to reduce survival of a microbe, as an antimicrobial therapeutic, in microbial treatment protocols, and in research, as well as other uses related to reducing microbe survival. In addition, the disclosure also includes compositions, as well as articles of manufacture, that comprise a broad spectrum antimicrobial agent.