Two deaths in Michigan have been linked to a nationwide cyclosporiasis outbreak now reported in 41 US states. Federal investigators have tied the cluster to lettuce imported from Mexico. The CDC has logged more than 4,100 lab-confirmed cases since May 1 and is probing over 7,400 probable additional cases as the supply-chain investigation continues.
Two Dead As Cyclospora Outbreak Linked To Mexican Lettuce Spreads To 41 US States
The parasite, called cyclospora, contaminates food and water and causes a severe stomach bug - Melanie Moser/CDC
Two people in Michigan have died amid a rapidly spreading outbreak of cyclosporiasis — an intestinal illness caused by the Cyclospora parasite — now reported across 41 US states.
Outbreak Details
Federal investigators say the outbreak has been tied to lettuce imported from Mexico that was served in the United States. Since May 1, the US Centers for Disease Control and Prevention (CDC) has received reports of more than 4,100 laboratory-confirmed cases and is investigating over 7,400 additional probable cases across 41 states.
Michigan health officials confirmed two deaths linked to the outbreak. A spokesman for the Michigan Department of Health and Human Services said both individuals had underlying medical conditions that may have been worsened by the intestinal infection and associated dehydration, and that the department would not be providing additional details.
How Cyclospora Spreads
Cyclospora cayetanensis is a microscopic parasite that contaminates food or water after contact with human faeces. Produce most commonly becomes contaminated when it is irrigated or washed with contaminated water. The parasite can survive on fresh produce and may not be removed by simple rinsing.
Symptoms: When ingested, Cyclospora causes intestinal illness marked by "frequent and sometimes explosive bowel movements," according to the CDC. Infected people may also experience watery diarrhea, stomach cramps, nausea, fatigue and weight loss. Severe dehydration is a risk, particularly for older adults and people with underlying health conditions.
Investigation And Guidance
Federal officials say the investigation is ongoing and warned that specific brands, restaurants, retailers or distribution channels may be connected as they trace the supply chain. At this stage, authorities have not published a comprehensive list of affected products or retailers tied to the lettuce shipments.
Health experts advise anyone with persistent diarrhea, bloody stools, high fever, or signs of dehydration to seek medical care. Laboratory testing is used to confirm Cyclospora infection, and doctors can prescribe appropriate treatment. Consumers should follow public health updates and recalls and handle fresh produce carefully—washing produce thoroughly and cooking when possible—to reduce risk.
Sources: Michigan Department of Health and Human Services; US Centers for Disease Control and Prevention (CDC); federal outbreak investigators.
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