Michigan health officials reported a staggering 5,002 cases of cyclosporiasis as of Friday, marking an increase of 690 cases in just one day

Michigan, which is where much of the outbreak is centered, has reported over 4,300 cases of cyclosporiasis, which can cause diarrhea and a low grade fever.

Nearly 7,000 cases nationwide are confirmed or under investigation, according to the CDC. Michigan has accounted for the bulk of cases so far.