Diarrhea-causing parasite infecting more than 1,200 in Michigan has not spread to Canada: PHAC
Health officials have not identified the source as cases climb rapidly, and more than 40 patients have been hospitalized, the Michigan Department of Health and Human Services said.
- The Michigan Department of Health and Human Services reported 992 cyclosporiasis cases as of Wednesday, July 8, 2026, marking a dramatic surge since the outbreak began June 22.
- Health officials have not identified a specific grower, supplier, or produce type as the outbreak's source, though investigations are ongoing across Michigan and 28 other states.
- Frequent, watery diarrhea and abdominal cramps are common symptoms, with illnesses lasting from a few days to over a month; approximately 40 hospitalizations have been reported due to dehydration.
- Officials confirmed 29 West Michigan cases on Tuesday, with the outbreak concentrated in Southeast Michigan and affecting at least 18 states nationwide.
- MDHHS recommends that entities preparing raw produce buy whole heads of lettuce, wash all fruits and vegetables thoroughly, and cook leafy greens when possible to prevent infection.
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92 Articles
Cyclosporiasis Outbreak Passes 1,400 Cases as Investigators Admit They Still Can't Trace the Source
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 …
Michigan and Ohio are seeing an influx of a diarrhea-causing infection. Pennsylvania is at normal levels for now
Pennsylvania has yet to see escalating cases of cyclosporiasis, an infection that can cause prolonged watery diarrhea. More than 1,000 cases have been...
Because of a parasite, the disease can cause intense diarrhea. Public Health Canada is, however, reassuring.
Over a thousand people are believed to have been infected with the Cyclospora parasite in the US states of Michigan and Ohio. Symptoms include severe diarrhea and stomach pain.
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