Map: Where cases of ‘explosive’ diarrhea-causing parasitic illness have been reported

More than 1,000 people in the U.S. have fallen ill with cyclosporiasis, a parasitic infection that can cause severe, "explosive" diarrhea.
Michigan is hardest hit (nearly 1,000 cases this year vs. about 50 on average); New York, Ohio, Illinois and North Carolina have also seen large spikes.
The illness is often linked to contaminated fresh produce (cilantro, basil, lettuce, berries); the CDC is investigating but has found no single, multistate source yet.