Inhibition of fooborne pathogens by bacteriocin-producing leuconostocs and lactobacillus sake isolated from "lingüiça frescal"

RESUMO

Two strains of lactic acid bacteria, isolated from "lingüiça" (a typical Brazilian meat product) stored under refrigeration, produced antagonistic substances active against selected foodborne pathogens. The proteinaceous nature of the inhibitors was demonstrated and so they were classified as bacteriocins. The inhibition due to acid production and phages was ruled out. The bacteriocin produced by Leuconostoc sp was active against Bacillus cereus, Listeria monocytogenes and Staphylococcus aureus. The bacteriocin produced by Lactobacillus sake was active against Listeria monocytogenes and Staphylococcus aureus. Gram negative were bacteria not inhibited by the bacteriocins produced.