Technological and beneficial features of lactic acid bacteria isolated from Boza A cereal-based fermented beverage

Abstract

Limosilactobacillus fermentum M3F, Levilactobacillus brevis M18F, Leuconostoc citreum M26F, Lactobacillus pentosus M7F, Lactiplantibacillus plantarum M15F, Leuconostoc lactis M31F, Lactococcus lactis M2F, and Lacticaseibacillus paracasei M32F were isolated from Boza samples produced in Turkey. The technological and beneficial features of the bacterial isolates were then evaluated. L. pentosus showed antibacterial activity against all pathogenic bacteria, which included Staphylococcus aureus ATCC 2393, Escherichia coli ATCC 25922, Escherichia coli O157:H7 ATCC 33150, Salmonella Enteritidis ATCC 13076, Vibrio parahaemolyticus ATCC 17802 and Listeria monocytogenes ATCC 7644. L. plantarum was also effective against all pathogens except L. monocytogenes. The resistance of the isolates to 0.3% bile salt was between 102-110% of the viability rate after 4h. The highest hydrophobicity was found in L. plantarum (90.99%), L. brevis (64.23%), L. fermentum (60.57%), and L. pentosus (50.59%). In addition, L. plantarum, L. pentosus, L. fermentum, and L. brevis were viable in a pH range of 2-9.6 and showed an ability to grow in the presence of high NaCl concentrations (10%).