Antimicrobial activity and storage stability of cell-free supernatants from lactic acid bacteria and their applications with fresh beef

This study aimed to evaluate the effectiveness of cell-free supernatants (CFS) produced by selected strains of lactic acid bacteria (LAB) as antimicrobials in vitro against Escherichia coli, Staphylococcus aureus, Shigella sonnei, Pseudomonas fluorescens, Salmonella Typhimurium, or Listeria monocytogenes. The agar-well diffusion method was performed using CFS from sixteen LAB. Neutralization of CFS pH as well as treatment with proteinase K were...