The CDC said people can contract the virus from touching live poultry or their environment, even if the birds appear to be healthy and clean.
The FDA is trying to identify the supplier to the stores where ill people shopped, according to the release.
A total of 21 people have been hospitalized.
Currently, the outbreak is limited to five states in the Midwest, with 32 of the 60 cases in MI.
There is only one reported case related to this outbreak in OH thus far.
On Friday, the grocery chain said they would be removing pre-cut cantaloupe, pre-cut watermelon, and pre-cut melon mixes.
The Illinois Department of Public Health says if you have any pre-cut melon from Walmart, throw it out.
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Walmart and Kroger have removed all cut melon associated with the outbreak. No deaths have been confirmed to date.
"In interviews, 55 (74%) of 74 ill people with information available reported contact with chicks or ducklings in the week before their illness started", the CDC said.
Other states included in this outbreak include Illinois, Indiana, Missouri and Ohio.
Salmonella can develop 12 to 72 hours after eating the contaminated food and usually lasts four to seven days.
Elderly people, infants and anyone with weak immune systems are more likely to have a severe illness. In rare cases, Salmonella infection can cause death unless the person is treated promptly with antibiotics.
Individuals who believe they might have gotten salmonella should contact their health care provider.