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Effects of bifidocin b and lactococcin r on the growth of listeria monocytogenes and bacillus cereus on sterile chicken breast

In the study, the efficacies of bifidocin B and lactococcin R produced by Bifidobacterium bifidum and Lactococcus lactis subsp. cremoris R to control Listeria monocytogenes or Bacillus cereus in irradiated raw chicken breast during storage at 5‐8C for 28 days or at 22‐25C for 24 h were determined. Each irradiated raw chicken breast was inoculated with 10 6 cfu/g L. monocytogenes or B. cereus. It was found that both bacteriocins were more effective against L. monocytogenes or B. cereus at 5‐8C than at 22‐25C, and that lactococcin R was more inhibitory than bifidocin B. Challenge study analysis demonstrated that incorporation of bifidocin B or lactococcin R at a level of 1,600 or 3,200 AU/g could effectively inhibit the growth of L. monocytogenes or B. cereus for 3‐4 weeks at 5‐8C or 6‐12 h at 22‐25C.