Outbreak of diarrhea-causing parasite grows to more than 1,000 cases

A significant outbreak of the parasite *Cyclospora cayetanensis*, causing diarrhea, has affected nearly 1,000 people in Michigan, marking the largest such outbreak in the state's history. Investigations are also underway in 28 other states, with Ohio reporting over 400 cases in its northwestern region. While the source of the infections remains unidentified, Michigan officials reported 992 cases and approximately 40 hospitalizations as of Wednesday. Cyclosporiasis, the illness caused by the parasite, is typically treated with antibiotics and is not usually life-threatening. This outbreak is notable as few U.S. cyclospora outbreaks in the past 20 years have exceeded 1,000 cases. Health officials recommend thorough washing of fresh produce and cooking vegetables to prevent infection.

Multiple US states are experiencing a significant increase in cyclosporiasis cases, a parasitic illness causing severe diarrhea. Michigan has reported nearly 700 cases, far exceeding its annual average. The Centers for Disease Control and Prevention (CDC) has identified over 400 cases across 18 states and is investigating the clusters with the FDA. Cyclosporiasis is spread through contaminated produce and water, with symptoms typically appearing about a week after exposure. While rarely life-threatening, the illness can cause cramps, nausea, and fatigue. Health officials recommend thoroughly washing produce or cooking it to reduce risk.