Risk factors associated with faecal shedding of verocytotoxin-producing Escherichia coli O157 in eight known-infected Danish dairy herds

Helene Rugbjerg, Eva Møller Nielsen, Jens Strodl Andersen

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    A risk-factor study was performed in eight dairy herds found to excrete verocytotoxin-producing Escherichia coli (VTEC) O157 in a former prevalence study. Associations between excretion of VTEC O157 and management factors such as housing and feeding were analysed in a generalised linear mixed model. The animals were stratified in three age groups and sampled four times during I year. The risk of excreting VTEC O157 was higher among weaned calves than non-weaned calves. Among the calves aged 1-4 months, the risk was reduced if the calf had suckled colostrum from the mother or if the calf had stayed >2 days with the mother after calving. Calves aged 5-24 months that had been moved within the last 2 weeks had a higher risk, but risk was reduced if fed barley silage. Cows fed grain or molasses had a higher risk of excreting VTEC O157.
    Original languageEnglish
    JournalPreventive Veterinary Medicine
    Volume58
    Issue number3-4
    Pages (from-to)101-113
    ISSN0167-5877
    Publication statusPublished - 2003

    Keywords

    • Escherichia coli O157
    • food safety
    • verocytotoxin-producing Escherichia coli
    • cattle

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