Antibacterial activity of raw milk against Listeria monocytogenes

Wayne Pitt, Terence Harden, Ronald R. Hull

    Research output: Contribution to journalArticlepeer-review

    4 Citations (Scopus)


    Raw bovine milk was shown to contain anti-Listeria monocytogenesactivity. L. monocytogenes inoculated into raw milkat 37°C to give an initial bacterial concentration of approximately10,000 cfu/mL multiplied at a reduced rate forapproximately 12 hours and then rapidly lost viability. Fifty-sixhours after the inoculation of raw milk, no viable cells ofL. monocytogenes were detectable. The anti-Listeria systemwas most active in raw milk incubated at 37°C. The activitywas reduced at lower temperatures of 25°C, 7°C and 4°C; byheating the milk at 72°C for 15 seconds (pasteurisation); andby storing the milk at 4°C for 4 to 6 days. These preliminaryresults require further study to elucidate the mechanism ofanti-Listeria activity in raw milk and also to determine the roleof antimicrobial systems in the control of pathogenic andspoilage micro-organisms in milk products.
    Original languageEnglish
    Pages (from-to)90-93
    Number of pages4
    JournalAustralian Journal of Dairy Technology
    Issue number2
    Publication statusPublished - 1999


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