Cyclosporiasis Outbreak Grows in Massachusetts, Causing Diarrhea
A cyclosporiasis outbreak, which causes diarrhea, is growing in Massachusetts.

Boston, MA, August 12, 2026 —
An outbreak of cyclosporiasis, an illness characterized by diarrhea, is expanding within Massachusetts. The Massachusetts Department of Public Health (DPH) has reported an increasing number of cases linked to this outbreak.
Cyclosporiasis is an intestinal illness caused by the microscopic parasite Cyclospora cayetanensis. It is typically contracted by consuming food or water contaminated with the parasite’s oocysts. Common symptoms include diarrhea, loss of appetite, weight loss, stomach cramps, bloating, gas, nausea, and fatigue. Some individuals may also experience vomiting, fever, and body aches.
The DPH has not yet identified the specific source of the outbreak. Investigations are ongoing to determine how the parasite is being spread within the state. Public health officials are advising residents to practice good hygiene and be mindful of food safety measures.
While the exact number of cases and the timeline of the outbreak’s progression were not immediately available, the DPH confirmed that the situation is developing. Further updates are expected as the investigation continues.
The public is encouraged to report any suspected symptoms to their healthcare provider. Early diagnosis and treatment can help manage the illness and prevent its spread.
Story summarized from the original created by Joseph Hosey on patch.com, see more information here.
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