Mississippi, Tennessee and Wisconsin were added Friday to the states with reported food poisoning cases.
Fourteen more people have become ill from Escherichia coli linked to romaine lettuce grown in the Yuma Arizona region, bringing the total number of those impacted by this outbreak to 98 people in 22 states, according to the FDA and CDC.
"We have not determined where in the supply chain the contamination occurred", Wise said.
CDC'S Matt Wise said everyone should avoid eating romaine lettuce unless it's clearly not from the Yuma.
News has confirmed Harrison Farms in Yuma, Ariz.is the source of the whole-head romaine lettuce that made eight prison inmates in Alaska sick, Federal Drug Administration's Stic Harris told reporters Friday.
The most recent illness started on April 20.
The CDC issued an alert earlier in April, urging people to not eat romaine lettuce and throw the vegetable away if you have it in your home due to the concern over E. coli. The agency expanded its warning from just chopped romaine to any and all forms of the lettuce - whole romaine, romaine in mixed salads, etc. "The cattle wandered into the stream at liberty, and the strain was found on the pasture land as well", Harris said.
People get sick three to four days after swallowing the germ, the CDC said. The Yuma region provides most of the romaine sold in the USA during the winter.
"The Shiga toxin strain in this outbreak is STX-2 only producing E. coli . one that tends to cause more severe illness based on the toxin profile it produces", Wise said.
Generally, E. coli is spread through human or animal feces, contaminated water or improper handling. Symptoms include diarrhea - often bloody - severe stomach cramps and vomiting. Most people recover in a week, but some can be hospitalized with more serious health problems and take longer to recover.
Although not one of those affected by the outbreak has died, 10 patients developed a risky form of kidney failure, the agency said.
The CDC suggests talking to a doctor if you have symptoms and reporting the illness to the local health department.