MICROBIAL POLLUTION OF GROUNDWATER IN THE TOWN OF WALKERTON, CANADA

Abstract

In May 2000, the town of Walkerton, Ontario suffered one of Canada’s worst outbreaks of waterborne disease. In the final toll, 2,300 people became ill and seven people died. The principal pathogens were Escherichia coli O157:H7 and Campylobacter jejuni, both...