Effects on the growth promotion of lactic acid bacteria, antimicrobial effect and antioxidant activity of natural materials

According to various negative effects of antibiotic growth promoters, the effects of naturederived alternatives to antibiotic growth promoters are mainly investigated in livestock industry these days.The effects of nature-derived alternatives to antibiotic growth promoters are mainly investigated in livestock industry these days.This study was conducted to estimate the efficiency of natural-derived alternatives to antimicrobial and antioxidant such as oregano oil (OGO), sulfide type antimicrobial peptides derived from Bacillus or Yeast (SAPBY), antimicrobial peptides derived from yeast (APY).The lactic acid bacteria growth effects were found to be minimal.The antibacterial activity of SAPBY was minimal, but OGO and APY showed antibacterial activity against Escherichia coli and Salmonella Typhimurium, and APY also showed antibacterial activity against Staphylococcus.Antioxidant effects were observed in all SAPBY, OGO, and APY, and when comparing the radical scavenging rate at 10 mgmL -1 for each sample, OGO showed the highest at 84.9%, followed by SAPBY at 48.7%.Therefore, the substances that can be used as natural antibiotics are SAPBY, APY, and OGO.It is believed that adding these substances to feed and feeding them to livestock will greatly contribute to improving the health of livestock and the productivity of safe livestock products.In further, research focused on various nature-derived alternatives to antibiotic growth promoter in livestock industry is needed.