1998 E. coli Outbreak at an Agricultural Fair in British Columbia, Canada
The British Columbia Center for Disease Control observed a cluster of E. coli O157:H7 infections. Subsequent molecular subtyping identified nine isolates with an indistinguishable genotype pattern. Three individuals were hospitalized, though none developed hemolytic uremic syndrome (HUS). Seven of the nine had an onset of illness within ten days of visiting a large agricultural fair. Despite in-depth interviews, no common source of infection could be identified.