https://cdnph.upi.com/ph/st/th/2981783975586/2026/upi_com/80b0b73dffb4bf968212d23af3d82ffc/v1.5/Parasite-outbreak-reaches-2800-in-US-causes-explosive-diarrhea.jpg" /> More than 2,800 cases of cyclospora infection have been reported, largely concentrated in Michigan, state health officials reported Monday.