The Iowa Department of Public Health says there are two reasons to be optimistic about the state’s outbreak of cyclospora infection.
Officials say the number of reported new cases is decreasing. Since Monday, there have been 10 new confirmed cases.
The highest count is 31 in Linn County, followed by five in Polk and Pottawattamie counties.
Officials also say the illness’ onset suggests people ate the tainted food in mid-June. That means the food causing the illness has likely been consumed or discarded.
The illness is causes by a rare parasite that attacks the digestive track.
Authorities don’t believe an Iowa-grown fruit or vegetable is causing the illness.