NBC Miami reports the Miami-Dade Health Department said Wednesday a cook at the Bayside Chili’s has a confirmed case of typhoid fever and likely prepared food for some time before it was finally diagnosed.

Every employee at the Chili’s is being examined to see if the disease was spread to them, but there may not be any way to get to the hundreds of people who may have consumed food prepared by the contaminated cook.

The restaurant is still open for business.

Typhoid fever is caused by Salmonella Typhi, a bacteria that can be passed on by eating or drinking something prepared by someone with the illness. It’s usually treatable by antibiotics.