Health officials are investigating a growing outbreak of cyclosporiasis, a parasitic intestinal illness that has sickened more than 1,000 people in Michigan and neighboring Ohio. The outbreak is the largest ever recorded in Michigan, and investigators have not yet identified the contaminated food or water source responsible for the illnesses.
Michigan has reported more than 1,500 confirmed cases and dozens of hospitalizations, while additional cases have been reported in Ohio and several other states. Public health officials are continuing to investigate whether the illnesses are connected, but no single food item, grower, supplier or distributor has been identified.
Cyclosporiasis is caused by the microscopic parasite Cyclospora cayetanensis, which is typically spread through contaminated food or water. Symptoms often begin about a week after exposure and may include watery diarrhea, stomach cramps, nausea, fatigue, loss of appetite and weight loss. Without treatment, symptoms can persist for weeks and may come and go over time.
Although previous U.S. outbreaks have been linked to fresh produce such as leafy greens, herbs and berries, health officials emphasize that no specific food has been connected to the current outbreak. They recommend thoroughly washing fresh produce, practicing good hand hygiene and seeking medical attention if persistent gastrointestinal symptoms develop.
Doctors say cyclosporiasis can usually be treated with prescription antibiotics once it is diagnosed. Older adults, young children and people with weakened immune systems may face a greater risk of complications from dehydration, making early medical evaluation especially important for anyone experiencing prolonged symptoms.
