Isolation bactericin producing Lactic acid cocci from some non pasteurized dairy products

Screening for bacteriocin production by strains of lactic acid bacteria (LAB) from local dairy products in Iran resulted in detection of nine strains bacteriocin producing strains. Among 105 isolates, nine bacteriocin producer were phenotypically and biochemically identified as Lactic acid cocci. The anti-microbial compounds produced by these novel strains were inactivated by trypsin, proteinase k. These bacteriocins also were active in wide range of pH and wide range of temperature. bacteriocins produced inhibited not only the closely retaliated LABs, but also Listeria monocytogenes.