The outbreak of an intestinal illness linked to McDonald’s salads has sickened 163 people in 10 states, with Illinois and Iowa residents representing the highest totals among them, the Centers for Disease Control and Prevention said late Thursday.
Three people have been hospitalized, according to the CDC, which is investigating the outbreak of cyclosporiasis in conjunction with the U.S. Food and Drug Administration and state health officials.
Cyclosporiasis is caused by the microscopic Cyclospora parasite and can cause diarrhea, stomach pain, fatigue and nausea among other symptoms.
It’s unclear exactly how many cases are confirmed in Illinois. As of July 13, there were 29 cases, according to data on the CDC website. As of Thursday, both Illinois and Iowa had a range of 21 to 70 cases.