Progress of Antimicrobial Peptides as Feed Additive Research Progress of Efficient Expression and Optimization of Production of Antibacterial Peptide Application and prospect of antimicrobial peptides in biological engineering of Chinese materia medica Progress on Antimicrobial Peptides’Gene Endogenous Expression Regulation and Clinical Application Identification and bactericidal activity of a novel Cathelicidin family member from skin of Bufu bufo gargarizans