The Public Health Agency of Canada is collaborating with provincial public health partners, the Canadian Food Inspection Agency and Health Canada to investigate an outbreak of Escherichia coli O157, commonly called E. coli. The outbreak involves five eastern provinces. Based on the investigation findings to date, exposure to romaine lettuce has been identified as the source of the outbreak, but the cause of contamination has not been identified. No individuals have had illness onset dates beyond December 12, 2017. As a result, the outbreak appears to be over, and the risk to Canadians has returned to low.
The Canadian Food Inspection Agency has completed its food safety investigation. All samples tested were negative for E. coli. As of January 10, 2018, there were 42 cases of E. coli O157 illness reported in five eastern provinces: Ontario (8), Quebec (15), New Brunswick (5), Nova Scotia (1), and Newfoundland and Labrador (13). Individuals became sick in November and early December 2017.
More information can be found on the Public Health Canada Website