The outbreak is the largest in Michigan’s history, with more seen across the country.

Cases of cyclosporiasis, which causes explosive diarrhea and other food poisoning symptoms, have topped 1,000. See which states have the most.

Cases have risen quickly as officials are working to identify a common source.

What to know about the current situation

An unprecedented 700-plus cases have been reported in Michigan alone

In neighboring Ohio, cases have reportedly reached over 500.