Four LAB strains (LD219, LPS04, LPS17 and LPS18) which
exhibited inhibitory efficiency toward tested pathogenic bacteria
were analyzed for their production of antibacterial compounds.
Supernatants obtained from all strains did not exhibit the inhibition
zones after pH adjustment to 6.5. It indicated that the inhibitory
effect toward pathogenic bacteria mainly because of organic acid
(data not shown). LAB produce various compounds such as organic
acids, diacetyl, hydrogen peroxide, and bacteriocin or bactericidal
proteins during lactic fermentations. The bacteriocins from them
are generally recognized as safe (GRAS) and LAB have attracted
a great deal of attention as a novel approach to control pathogens in
food-stuffs