Abstract
Pediococcus acidilactici strains E, F and H isolated from fermented sausages produced bacteriocins which were protein in nature and inhibitory to a variety of spoilage and pathogenic microorganisms often encountered in foods. These strains harbored two to three plasmids ranging in size from 7.4 to 40.2 megadaltons. Curing experiments and plasmid profile analysis indicated the involvement of plasmid DNA with bacteriocin activity in all three strains. Carbohydrate fermentation and antibiotic resistance phenotypes did not appear to be associated with bacteriocin plasmids. Both bacteriocin activity and resistance determinants were linked in strain H and mediated by a 7.4-megadalton plasmid, whereas in strains E and F these two traits were not linked.
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