That's the highest number of people sick in an E. coli outbreak since the 2006 outbreak that sickened 199 and put 102 in hospitals.
In an update issued Friday to a multi-state E. Coli outbreak, the CDC said its warning includes whole heads and hearts of romaine lettuce, in addition to chopped romaine, salads and salad mixes contain romaine.
The two chains say they aren't selling lettuce grown in the Yuma, Arizona region, which the U.S. Center For Disease Control reports is the where the outbreak originated.
All three cases were recorded in Mahoning County.
"They're waiting for the toxins to leave her body completely", Halley said. If you do not know whether the lettuce is romaine, throw it away.
Out of the 84 infected, 42 people have been hospitalized, including nine people who have developed a type of kidney failure called hemolytic uremic syndrome, which can be life-threatening.
All hospitalized individuals in Idaho were adults between the ages of 20 and 55.
Although not one of those affected by the outbreak has died, nine patients developed a risky form of kidney failure, the agency said. Fortunately, no deaths have been reported.
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While the current cases are connected to the Yuma, Arizona, area, the CDC warns that package labels do not often identify growing regions. That includes all kinds of lettuce, whether chopped, whole-head or in a salad mix.
Do not serve or sell any romaine lettuce from the Yuma, Arizona growing region.
Is romaine lettuce safe to eat yet?
State and local health officials continue to interview ill people to ask about the foods they ate and other exposures before they became ill.
The case count by state in this E. coli O157:H7 HUS outbreak is: Alaska (5), Arizona (5), California (13), Colorado (2), CT (2), Georgia (1), Idaho (10), IL (1), Louisiana (1), MI (2), Missouri (1), Montana (7), New Jersey (7), NY (2), OH (3), Pennsylvania (18), South Dakota (1), Virginia (1), and Washington (2).
Elsewhere in the Northwest, Montana has reported six cases, and Washington has reported a single case.
Illnesses include 12 cases in Pennsylvania, 10 cases in Idaho, seven cases in New Jersey, six cases in Montana, three cases in Arizona, two each in Connecticut, Michigan, New York and OH, and one case each in Alaska, California, Illinois, Louisiana, Missouri, Virginia and Washington.
California exploded from one case to 13.