"Although there is no conclusive link to our restaurant being the source of the illness, we voluntarily took these actions out of an abundance of caution," a spokesman for the company said in a statement to CNBC.
"The restaurant re-opened Sunday following consultation with the health department."
Health officials who inspected the Overland Park restaurant over the weekend found 17 code violations, including liquor bottles that contained small, dead insects, and an employee wiping his nose, then resuming work without washing his hands or changing gloves, the Star reported.
Officials are continuing to look into the source of the illness.
"We are working with the Johnson County Department of Health and Environment, the City of Overland Park and the Kansas Department of Agriculture to investigate these illnesses," Sara Belfry, communications director for the Kansas Department of Health and Environment, said in a statement to CNBC.
"The exact cause and source of the illness is unknown at this time and is pending laboratory results."
For more on the report, see the full story at the Kansas City Star.
— CNBC's Jeff Daniels contributed to this report.