Bovine colostrum exosomes are a promising natural bacteriostatic agent against staphylococcus aureus

Bioactive molecules and immune factors in the bovine colostrum (BC) are important elements of passive immunity that prevent bacterial infection. However, the mechanisms underlying the antimicrobial activity of BC are not fully understood. Researchers at Chungbuk National University assessed the antibacterial properties of BC-derived exosomes (BC-Exo) and found that they had bacteriostatic, anti-hemolytic, and biofilm-eradication effects on Staphylococcus aureus. Moreover, cell surface deformation and reduced ATP production were observed following BC-Exo treatment. The most reasonable explanation for this finding is that BC-Exo has a strong inhibitory effect on the oxidative phosphorylation pathway in S. aureus. The researchers demonstrated, for the first time, that BC-Exo can exhibit clear antimicrobial activity against S. aureus. These findings constitute an important basis for future antibiotic discovery.