Outbreak investigation and case-control study: Penta-resistant Salmonella Typhimurium DT104 associated with biltong in London in 2008

M. J. Mindlin*, N. Lang, Helen Maguire, B. Walsh, Neville Verlander, C. Lane, C. Taylor, L. A. Bishop, Paul Crook

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    13 Citations (Scopus)

    Abstract

    In August 2008 an outbreak of Salmonella Typhimurium DT104 occurred in South West London. Sixteen cases were identified with a particular multilocus variable number tandem repeat analysis (MLVA) pattern. In a matched case-control study 14 primary cases were included. These were defined as individuals with gastrointestinal symptoms and Salmonella Typhimurium DT104 isolated from a stool specimen, with a characteristic antibiotic resistance profile and MLVA pattern, and diagnosed in a local laboratory. Four controls per case were matched on age, gender and area of residence. Cases were 26 times more likely than controls to have eaten beef biltong, a South African speciality meat product (odds ratio 25·83, 95% confidence interval 4·92-135·59, PÂ <Â 0·01). Although environmental investigation failed to identify Salmonella in the food product we conclude that beef biltong consumption led to this outbreak. This conclusion has importance in informing the ongoing risk assessment relating to uncontrolled foodstuffs.

    Original languageEnglish
    Pages (from-to)1920-1927
    Number of pages8
    JournalEpidemiology and Infection
    Volume141
    Issue number9
    DOIs
    Publication statusPublished - Sep 2013

    Keywords

    • Biltong
    • Salmonella
    • food poisoning
    • gastroenteritis
    • matched case-control study

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