Antimicrobial activity of lactic acid bacteria and the spectrum of their biopeptides against spoiling germs in foods

Abstract

The objective of this study was to isolate LAB from dairy, meat products and agro-industrial wastes and to investigate their antagonist activity. A total of 141 isolates were screened for the inhibitory effect on ten indicator strains in the agar spot test. Results showed that strain LBbb0141 contained antimicrobial compound with wide spectrum that inhibited the growth of ten indicator Gram-positive and Gram-negative strains. The bacteriocin activity attained its maximum value using the MRS agar at initial pH 7.5 and 30°C incubation temperature.

Keywords

• Lactobacilli
• Enterocoquess
• Leuconostoc sp
• bacteriocins activities
• indicators microorganisms
• Listeria innovii
• growth media
• pH
• temperature