Officials with the B.C. Centre for Disease Control have issued a warning after six people were infected with the same strain of E. coli.
The BCCDC said Friday that all six were infected between February and April, with the strain known as O121.
It is believed that at least one of the six had consumed tainted flour, which was tested by the BCCDC and found to contain O121.
The flour was available to Costco members in B.C. starting Januray.
The B.C. advisory comes at the same time as a national outbreak linked to various flours, but officials said the national warnings involve a different strain of O121, and it is not known whether the cases are linked.