A longitudinal study of Escherichia coli O157 in fourteen cattle herds

D. D. Hancock, T. E. Besser, D. H. Rice, D. E. Herriott, P. I. Tarr

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276 Scopus citations


Escherichia coli O157 shedding in 14 cattle herds was determined by faecal culture at intervals of approximately 1 month for up to 13 months. The overall prevalence was 1.0% (113/10832 faecal samples) and 9 of the 14 herds were detected as positive. Herds positive 2 years previously (n = 5) had a higher prevalence of positive cattle (median = 1.9%) than herds which had been negative on a previous sampling (n = 8, median = 0.2%). Weaned heifers had a higher prevalence (1.8%) than did unweaned calves (0.9%) or adults (0.4%). For all herds the highest prevalence occurred in the summer months, which resulted in most of the positive faecal samples being collected on a minority of sampling visits.

Original languageEnglish
Pages (from-to)193-195
Number of pages3
JournalEpidemiology and infection
Issue number2
StatePublished - Apr 1997


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