Modelling the vector pathway and infection of humans in an environmental outbreak of Escherichia coli O157

Norval James Colin Strachan, Iain D Ogden, D. R. Fenlon

Research output: Contribution to journalArticlepeer-review

84 Citations (Scopus)


Quantifying the transfer of Escherichia coli O157 from the environment to humans is essential for understanding outbreaks, establishing the infectious dose of the organism and proposing safeguards. We modelled the pathogen loading shed onto a field by sheep immediately prior to a scout camp where 18 scouts and two adults were infected with E. coli O157. We estimated the dose ingested (4-24 organisms) which is in agreement with the low infective dose reported previously for this organism in food outbreaks. These data closely fit a surrogate Shigella dose-response model which can be used as a basis for risk assessment. (C) 2001 Federation of European Microbiological Societies. Published by Elsevier Science B.V. All rights reserved.

Original languageEnglish
Pages (from-to)69-73
Number of pages4
JournalFEMS Microbiology Letters
Issue number1
Publication statusPublished - 2001


  • bacterial modelling
  • environmental outbreak
  • Escherichia coli O157
  • BEEF

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