992 cyclosporiasis cases have been confirmed in Michigan since June 22, with 36 hospitalizations and no deaths reported.
Michigan usually records about 50 cases a year, making the outbreak nearly 20 times normal levels and prompting officials to focus on a likely foodborne source.
State health officials suspect contaminated produce, but have not identified any specific item, grower, supplier or produce type tied to the infections.
177 cases have also been reported in Ohio, while the CDC has logged 145 cases across 17 other states since May 1, pointing to a broader regional and national spread.