Ill people in this outbreak were infected with E. coli bacteria with the same DNA fingerprint as the E. coli strain isolated from ill people in a 2017 outbreak linked to leafy greens in the United States and to romaine lettuce in Canada.
Officials were uncertain of the source of the tainted lettuce. Romaine lettuce is displayed at a grocery store on May 2, 2018 in San Anselmo, California.
The CDC has reported that there has been a new outbreak of cases of E. coli tied to romaine lettuce.
Sheila Lowrie, a spokeswoman for the Kansas grocer says "romaine lettuce and products containing romaine are being removed from sale as soon as possible until further notice". One of the hospitalized people developed hemolytic uremic syndrome, a potentially life-threatening formof kidney failure.
Flashback: Earlier this year, an outbreak of romaine lettuce lasted for four months from March to June, according to Vox. Those who have any type of romaine lettuce in the fridge - including whole heads, romaine hearts, boxes of romaine or salad mixes with romaine - are asked to throw it away, even if some of it was eaten without leading to illness.
The Public Health Agency of Canada, which is investigating 18 of the E. coli cases, directed its romaine lettuce alert at consumers in Ontario and Quebec.
No deaths have been reported, but 13 of the people who became sick in the U.S. were hospitalized.
Lowrie says consumers may return romaine lettuce or items that contain it for a full refund.
Foodborne illness hits one in six Americans every year, the CDC says, estimating that 48 million people get sick due to one or another of 31 pathogens.
Report your illness to the health department. As with past outbreaks, the CDC will publish other future advisories with additional information when it becomes available.