Pennsylvania and CT reported two cases and the other states have all reported one, CNN said.
In a Tuesday, April 10 update, the CDC reports the outbreak had further reached the Midwest in OH and Pennsylvania.
"CDC is not recommending that consumers avoid any particular food at this time", the organization's notice said. Six of them were hospitalized and, of that group, one developed kidney failure from a condition called hemolytic uremic syndrome. Restaurants and retailers are not now advised to avoid serving or selling any particular food.
CDC reports that illnesses started being reported on March 22, and that those infected range in age from 12 to 84 years old with a median of 41.
A similar multi-state outbreak of Shiga toxin-producing Escherichia coli O157:H7 infections last fall infected 25 people in 15 states.
"The investigation is still ongoing and a specific food item, grocery store, or restaurant chain has not been identified as the source of infections", the USA agency reports.
Other states reporting outbreaks include Idaho, Pennsylvania, Missouri, Ohio and Washington.
The suspected cause for the late 2017 outbreak was believed to be leafy greens. More information will be provided as it becomes available, the CDC said. They should also track the foods they've eaten and restaurants they've eaten in the week prior to becoming ill.
Symptoms of an E. coli infection can include severe stomach cramps, diarrhea, nausea, and vomiting, with most people recovering after five to seven days.
As always, proper food cleaning and preparation is the best defense.