In Illinois, cases are happening in people between the ages of 23 and 87 across the state.
Walmart stores in IL have removed pre-cut melons from their shelves, according to IDPH.
The CDC said the pre-cut melon was supplied by Caito Foods in Indianapolis.
U.S. Food and Drug Administration officials are working alongside the Centers for Disease Control and Prevention to identify the precise source of the outbreak. Officials say it is recommended that people not eat pre-cut melon from Walmart stores anywhere in IL.
Fruit salad containing melon purchased at Walmart, Kroger, Jay C or Payless stores in the affected states.
"The investigation is ongoing to determine if products went to additional stores or states", the CDC wrote Friday.More news: How to watch French Open on TV and online
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Those products have now been linked by officials to a rash of salmonella infections around the county. Most people recover without treatment, but severe cases can lead to hospitalization.
Customers who purchased the melon from the company's IN and MI store locations should not consume them and return them to a store for a full refund or replacement.
Salmonella symptoms tend to include diarrhea, fever and abdominal cramps between 12 and 72 hours after someone eats the contaminated food.
No deaths have been reported, the CDC said. The elderly, infants and people with compromised immune systems have the highest risk for serious illness.
The advice from the CDC does not apply to whole melons.
The people who became sick reported eating pre-cut cantaloupe, watermelon or mixed fruit salad that had melon in it.