?-Poly-l-lysine and nisin A act synergistically against Gram-positive food-borne pathogens Bacillus cereus and Listeria monocytogenes
- 1 July 2007
- journal article
- Published by Oxford University Press (OUP) in Letters in Applied Microbiology
- Vol. 45 (1), 13-18
- https://doi.org/10.1111/j.1472-765x.2007.02157.x
Abstract
To test epsilon-poly-L-lysine and nisin A for possible synergistic activity against selected food-borne pathogens and food spoilage organisms. Synergistic activity was observed against Gram-positive Listeria monocytogenes and Bacillus cereus cells and spores of B. cereus in 96 well plate assays. However, nisin A had no effect alone or in combination with epsilon-poly-L-lysine against Gram-negative Escherichia coli cells. In addition, when tested against yeast Zygosaccharomyces bailii, nisin A and partially inhibitory concentrations of epsilon-poly-L-lysine antagonized each other. Nisin A and epsilon-poly-L-lysine showed synergistic activity against B. cereus and L. monocytogenes. The application of nisin A and epsilon-poly-L-lysine is a promising all-natural method of controlling Gram-positive food-borne pathogens, spores and spoilage organisms.Keywords
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