IN VITRO ANTAGONISTIC ACTIVITY OF A PROBIOTIC LACTOBACILLUS PLANTARUM AGAINST WATER BORNE PATHOGENS

摘要

Objective: Lactic acid bacteria (LAB) produce various substances that exhibit antagonistic activity against other bacteria. Detection of antimicrobial substance produced by lactic acid bacteria against the water borne pathogens is the objective of this work. Materials: The bacteriocin producing probiotic strain Lactobacillus plantarum was isolated from a grass silage samples and identified based on the characteristics of Lactobacillus plantarum as present in Bergey's manual of Systemic Bacteriology. The metabolite bacteriocin was extracted from the isolated strain and the antagonistic activity was evaluated against water borne pathogens. Results: The bacteriocin producing strain, L.plantarum exhibited the inhibitory zone ranged from 16 mm to 24 mm against water borne pathogens. Conclusion: Results from this study concluded that the compound bacteriocin produced by L. plantarum have the potential to inhibit water borne pathogens