A longitudinal study of Escherichia coli O157 in fourteen cattle herds

Epidemiol Infect. 1997 Apr;118(2):193-5. doi: 10.1017/s0950268896007212.


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.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Age Factors
  • Animal Husbandry
  • Animals
  • Cattle
  • Cattle Diseases / microbiology*
  • Escherichia coli Infections / microbiology*
  • Escherichia coli O157*
  • Feces / microbiology
  • Longitudinal Studies
  • Prevalence
  • Seasons
  • Time Factors