Health officials say the contaminated lettuce is from Yuma, Arizona.
Freshway Foods is recalling chopped romaine lettuce sold at Schnucks stores.
A multistage outbreak of E. coli prompted a recall of the products, according to the release. The earliest symptoms began on March 22.
So far, 35 people have become ill across the country.
This type of E. coli bacteria can cause bloody diarrhea, severe abdominal cramps, vomiting, and low-grade fever. Most people recover in five to seven days.
If you have chopped romaine lettuce in your fridge, you should throw it out. Those at particular risk include very young children and the elderly.
Health officials warned the public to stay away from chopped romaine lettuce. If you have lettuce and you're not sure whether it's romaine, throw it out.
The advice is based on interviews with 28 of the ill individuals in which 93% of them reported consuming romaine lettuce within the week they began feeling sick.
You can also visit the U.S. Food and Drug Administration's website for more information.