Consumers warned against eating romaine lettuce from Salinas, Calif. - Action News
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Health

Consumers warned against eating romaine lettuce from Salinas, Calif.

A U.S. outbreak of E. coli infections linked to romaine lettuce has led to warnings in both the United States and Canada for consumers to check labels for where the produce was grown.

Search continues for source of E. coli tied to 40 cases of illness in U.S. and possibly 1 in Canada

It's not clear exactly why romaine keeps popping up in outbreaks, but food safety experts point to the popularity of romaine lettuce and the difficulty of eliminating risk for produce grown in open fields and eaten raw. (Mark J. Terrill/The Associated Press)

Health officials in the U.S. and Canada on Friday told people to avoid romaine lettuce grown in Salinas, Calif., because of another food poisoning outbreak in the United States.

The notice comes almost exactly one year after a similar outbreak led to a blanket warning about romaine.

Officials are urging consumersnot to eat the leafy green if the label doesn't say where it was grown. They also urged supermarkets and restaurants not to serve or sell the lettuce, unless they're sure it was grown elsewhere.

The warning applies to all types of romaine from the Salinas region, include whole heads, hearts and pre-cut salad mixes.

"Canadian and U.S. health officials are collaborating to identify commonalities between the recent illnesses in an effort to identify the source of contamination affecting consumers," the Public Health Agency of Canada said on Friday.

At this time, there is no outbreak of E. coli occurring in Canada. The U.S. CDC is reporting multiple illnesses in several U.S. states. As of Nov. 22, there is one Canadian illness related to the U.S. outbreak that has been identified in the province of Manitoba. This individual became ill in mid-October.

The Canadian Food Inspection Agency (CFIA) has confirmed that romaine lettuce from the affected areas reported in the U.S. investigation is imported toCanadaat this time of year. The CFIAsays it has taken measures to protect consumersand is implementing new actions at the border to ensure that any affected romaine lettuce products are no longer being imported intoCanada.

"We're concerned this romaine could be in other products," said Laura Gieraltowski, lead investigator of the outbreak at the U.S. Centers for Disease Control and Prevention.

U.S. officials said their investigation led to farms in Salinas and that they are looking for the source of E. coli tied to the illnesses. Salinas is a major growing region for romaine from around April to this time of year, when growing shifts south to Yuma, Ariz.

Harvest regions now identified

After last November's outbreak tied to romaine, the produce industry in the U.S. agreed to voluntarily label the lettuce with harvest regions. Health officials said that would make it easier to trace romaine and issue more specific public health warnings when outbreaks happen.

Officials never identified exactly how romaine might have become contaminated in past outbreaks. But another outbreak in spring 2018 that sickened more than 200 people and killed five was traced to tainted irrigation water near a cattle lot. (E. coli is found in the feces of animals such as cows.)

It's not clear exactly why romaine keeps popping up in outbreaks, but food safety experts note the popularity of romaine lettuce and the difficulty of eliminating risk for produce grown in open fields and eaten raw.

Industry groups noted that they tightened safety measures following last year's outbreaks, including expanding buffer zones between growing fields and livestock.

40 people report illness in 16 states

"It's very, very disturbing. Very frustrating all around," said Trevor Suslow of the Produce Marketing Association.

The CDC says 40 people have been reported sick so far in 16 states. The most recent reported illness started on Nov. 10. The agency says it's the same E. coli strain tied to previous outbreaks, including the one from last Thanksgiving.

The CDC's Gieraltowski said that suggests there's a persisting contamination source in the environment.

With files from CBC News