The Centers for Disease Control and Prevention says to stay away from all chopped romaine lettuce.
At least 31 of the people who have become sick due to the outbreak have been hospitalized. Symptoms, which can take up to eight days after eating to surface, include severe stomach cramps and vomiting.
The CDC says the hospitalization rate for this outbreak is higher than normal and officials are working to figure out why.
Five patients reportedly have developed hemolytic uremic syndrome, a condition that causes kidney failure. The CDC has yet to identify the outbreak's source, but it suspects that it's related to chopped romaine lettuce from the Yuma, Arizona region.
Last week the CDC and the US Food and Drug Administration were working to determine the source of the outbreak, on Friday officials with the CDC said the infection was linked to romaine lettuce from the growing region of Yuma, Arizona region.
On Tuesday 66-year-old New Jersey woman Louise Fraser sued Panera Bread for allegedly eating contaminated lettuce at one of their restaurants, forcing her to be hospitalized for two weeks. Since March, the outbreak has affected 53 people across 16 states.
If you have lettuce in your house and you're not absolutely sure it didn't come from the Yuma area, throw it away-even if no one has gotten sick.
The agency has not identified a common grower, supplier, distributor or brand.
Romaine lettuce is sometimes packed in the field and shipped directly to restaurants or grocery stores.
The CDC reported 12 cases in Pennsylvania and 10 cases in Idaho.
It's unclear if any Lehigh Valley residents have been infected with E. coli bacteria because the state Health Department, citing privacy rules, wouldn't say which counties have reported cases.
The different ways that romaine lettuce is harvested could make identifying the specific origin of contamination more hard, Marler said.
Bad E. coli typically comes from the feces of animals.
The CDC traced the outbreak to the lettuce after interviewing numerous ill people about where and what they'd eaten recently.