No Fair Warning: An Outbreak Following the 1999 Washington County Fair

Large outbreak of both E. coli and Campylobacter traced to unregulated fairground water supply, 1999; another straightforward outbreak investigation.

Learning Objectives:

After completing this case study, the participant should be able to:

• List the reasons to investigate an outbreak;
• List and discuss each step in the investigation of an outbreak;
• Describe the features of an appropriate case definition; and
• Construct an epidemic curve.