The department also believes the virus was foodborne instead of an environmental issue.
“I would suspect this is a foodborne illness. Again, Norovirus is a flu-like stomach bug, if you will. And that’s what we see, that’s what it’s pointing to again. Where did it actually come from? Was it food contact surface or was it an affected food service worker?” said health commissioner Eric Zgodinski.
The Toledo-Lucas County Health Department said the outbreak is tied to Mama C’s Donuts located on Conant Street in Maumee. The restaurant remains closed during the investigation.
All those affected by the virus had eaten at the restaurant from August 4 to August 7.
The restaurant voluntarily closed for cleaning on August 8.
Symptoms of Norovirus include diarrhea, vomiting, abdominal pain, headaches, body aches and a mild fever.
The health department said people typically become sick 24 to 48 hours after exposure to the virus, with symptoms lasting one to two days.
However, people who had the virus can spread it up to two weeks after the symptoms go away.
Norovirus is spread through contact with infected individuals or through contaminated food prepared by a person who is currently or was recently ill.
The health department said Norovirus is common this time of year, and those affected should refrain from handling and working with food for at least three days after their symptoms go away.