VALPARAISO | The Porter County Health Department has heard from more than 60 people who may have become ill as a result of eating food from the Jimmy John's restaurant on Lincolnway.

Nobody from the group, which included emergency workers from Friday's three-train wreck in Jackson Township, has been hospitalized and all are expected to make a full recovery.

The health department places the blame on gastroenteritis, a highly contagious illness involving inflammation of the stomach and intestines.

Health department staff met with restaurant management, who reportedly cooperated and voluntarily closed the business temporarily. The business was sanitized and inspected before being allowed to reopen for lunch Wednesday with employees from different locations.

The restaurant's employees are being tested for gastroenteritis and will not be allowed to return to work until medically cleared.

A manager at the store Wednesday declined comment.

Anyone impacted by a food-borne illness, should drink plenty of liquids, eat bland foods and consult a health care provider if the illness persists beyond 72 hours or if a fever develops, Porter County Health Officer Maria Stamp said.

The spread of gastroenteritis can be minimized by practicing good hygiene, including frequent hand washing with soap and water.

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