A parasite that causes weeks of relapsing, explosive diarrhoea has now sickened more than 1,400 people across Michigan and Ohio, and investigators still can't say where it's coming from, leaving families across the US midwest exposed at the height of produce-and-pool season.
Cyclosporiasis, caused by the microscopic parasite Cyclospora cayetanensis, has hit Michigan hardest. State officials confirmed 1,251 cases as of Thursday, up from about 50 in a normal year. While Ohio has officially confirmed 177 cases statewide due to lagging data, local tracking in counties bordering Michigan has already surged past 500, including 306 cases in Lucas County alone.
