The objective of this study was to evaluate the antibacterial effect of sophorolipid in combination with lactic acid against relevant bacteria isolated from the poultry industry. Staphylococcus aureus, Listeria monocytogenes, Salmonella enterica, and Escherichia coli were isolated from chicken meat and antibacterial tests with sophorolipid and lactic acid were performed. Checkerboard, time-kill, and scanning electron microscopy analyses were used to confirm the antibacterial action and the combined effects. Although no inhibitory effects were observed for E. coli and Salmonella, these compounds presented antibacterial activity against L. monocytogenes and S. aureus. Additionally, sophorolipid and lactic acid were not cytotoxic at the concentrations used in the tests. The combination of sophorolipid and lactic acid resulted in an additive interaction, reducing the concentration of the active compounds needed for effectiveness against S. aureus and L. monocytogenes, to 50% and 75%, respectively. These findings lead to the possibility of developing a new, sustainable, and natural antimicrobial solution that is considered noncytotoxic and has wide applicability in the poultry industry to reduce substantial losses in this sector.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8578371 | PMC |
| http://dx.doi.org/10.1007/s42770-021-00545-9 | DOI Listing |
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