NOVEL LACTICIN NK34 AND METHOD FOR PRODUCTION THEREOF EFFECTIVE ON BREAST INFLAMATION CAUSED MICROBE BY OPTIMIZING CULTURE MEDIUM

摘要

PURPOSE: A Lactococcus lactis NK34 for producing bacteriocin lacticin NK34 having antibacterial effect to bovine mastitis bacteria is provided to replace antibiotics and to produce a large amount of lacticin NK34. CONSTITUTION: A Lactococcus lactis NK34 strain is purely cultured in MRS medium and produces bacteriocin lacticin NK34 having an effect of suppressing bovine mastitis causing bacteria. The Lactococcus lactis NK34 KFCC 11458P is cultured in a medium containing sucrose, tryptone, yeast extract, tween 80, sodium acetate, and NaCl. A medium composition for culturing Lactococcus lactis NK34 KFCC 11458P or performing biosynthesis of bacteriocin lactinic NK34 contains sucrose, tryptone, yeast extract, tween 80, sodium acetate, and NaCl.