The Michigan Department of Health & Human Services (MDHHS) has issued guidelines recommending that certain foods be cooked to ensure safety due to a Cyclosporiasis outbreak. This parasitic illness can lead to severe diarrhea.
Michigan has witnessed a dramatic rise in cases, with 2,640 infections reported by July 13, compared to an average of 50 annually. MDHHS has highlighted five food types that require careful handling for those working in restaurants and commercial kitchens. Safe cooking is advised for foods like leafy greens, cilantro, basil, green onions, snow peas, and raspberries. Thorough washing is essential before cooking.
Raspberries present a particular challenge due to their textured surface, which can harbor parasites. Cooking these into jams or pies, or opting for frozen varieties, is advisable. Other food preparations include buying lettuce whole, discarding the outer leaves, and trimming the root and outer layer of green onions.
“Wash fresh produce thoroughly and avoid cross-contamination with cooked foods.” – Ynés Ortega, Associate Professor
An outbreak source hasn’t been identified yet. Ortega warns that berries and vegetables are common culprits in past outbreaks.
Cyclosporiasis has been rising across the nation, with elevated counts in several states:
- Michigan: 2,500+
- New York: 394 cases
- Ohio: 364 cases
- North Carolina: 205 cases
- Illinois: 141 cases
- Texas: 48 cases
The Centers for Disease Control and Prevention (CDC) reported over 800 confirmed cases since May 1, 2026, along with 1,500 more needing analysis. National data often lags state reporting, leading to discrepancies the CDC is working to resolve.
Symptoms of Cyclosporiasis appear about a week after ingesting contaminated sources. The infection is known for causing:
- Watery and frequent diarrhea
- Severe stomach cramps and bloating
- Nausea and loss of appetite
- Fatigue and weight loss
Individuals with persistent gastrointestinal issues should seek medical advice and consider specific parasite tests.