Antimicrobial effect of phytochemicals to Listeria monocytogenes isolated from slaughterhouses

초록

This objective of this study was to investigate inhibitory effect of natural antimicrobials on Listeria monocytogenes isolated from Korean slaughterhouses. A mixture of 15 strains of L. monocytogenes at low (3 Log CFU/mL)and high (7 Log CFU/mL) concentration was exposed to various extracts (grapefruit seed extract, citrus fruits extract, ginger extract, pear extract, Japanese apricot concentrate, balloon flower extract, jujube extract, and omija extract) at 0.001-4.0μg/mL . Ginger extract, pear extract, Japanese apricot concentrate, balloon flower extract, jujube extract, and omija extract showed no antimicrobial effects to high-concentration of L. monocytogenes (7 Log CFU/mL). However, grapefruit seed extract and citrus fruit extract showed antibacterial effects against L. monocytogenes at 3 and 7 Log CFU/mL with MBCs of 0.001 and 0.002 μg/mL, respectively. These results indicate that grapefruit seed extract and citrus fruits extract can be used to control L. monocytogenes as natural antimicrobials.

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