As of November 20, 2018, 32 people infected with the outbreak strain of E. coli O157:H7 have been reported from 11 states.
Public Health Agency of Canada is urging everyone in Quebec and Ontario to throw away their romaine lettuce because of an E. coli outbreak.
Officials in both countries are collaborating to investigate an outbreak reported in Ontario, Quebec and several states in the US.
"This advice includes all types or uses of romaine lettuce, such as whole heads of romaine, hearts of romaine, and bags and boxes of precut lettuce and salad mixes that contain romaine, including baby romaine, spring mix, and Caesar salad", the CDC said, noting that it had not been able to pinpoint precisely where the suspect leaves had originated.
Read the full public health notice at this link.
While it can in cases be life-threatening, most people recover within a week. Six people have been hospitalized, one with serious complications.
Pinpointing the exact cause of the outbreak can be hard because public health officials often have to search for similarities in places those who fall ill have visited or what they've eaten.
The public health agency is working with the United States Centers for Disease Control and Prevention and the United States Food and Drug Administration to investigate the outbreak. The CDC said that investigations were ongoing, and that United States consumers with any type of romaine lettuce in their homes should throw the vegetable away, even if some of it was eaten without anyone falling ill. One of those had suffered kidney failure.
On Tuesday, the US CDC said that the romaine lettuce-linked food poisoning outbreak was due to the E. coli bacteria. At this time, no common grower, supplier, distributor, or brand of romaine lettuce has been identified.