Recently, increasing attention has been paid on Leuconostoc lactis as a promising bioactive organism against food-borne and spoilage bacteria. A total of nine strains, including six different species of the genus Lactobacillus and three species of the genus Leuconostoc, were isolated from chicken carcasses (n=60) collected from wholesale poultry markets located at Al-Riyadh city, Saudi Arabia in 2016 and identified by API 50 CHL assays. L. lactis isolates were resistant to bile salts and

more »

... cin. The autolytic phenotype of L. lactis was evaluated under starvation conditions in the presence of potassium phosphate buffer. The strains tested showed partial autolysis of approximately 18% after 7 h of starvation at 37°C at the end of the exponential phase. The inhibitory activity of whole-protein extracts of L. lactis against the foodborne bacteria, Listeria monocytogenes, Bacillus cereus, Bacillus subtilis, Staphylococcus aureus and Micrococcus luteus was evaluated by renaturing sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE). The major activity of the total protein appeared as two clear bands on the SDS-PAGE, of approximately 57 and 42 kDa against L. monocytogenes, B. cereus and B. subtilis. No active band was shown against S. aureus and M. luteus.