Outbreak of Cyclosporiasis Occurring in Michigan, More Cases Detected in Genesee County

The Genesee County Health Department is providing updates on the status of the cyclosporiasis outbreak in Michigan and Genesee County. As of July 27, 2026, 9,253 cases have been detected in Michigan, and 431 cases have been identified in Genesee County. Per CDC and FDA, initial investigations have linked the outbreak to shredded iceberg lettuce consumed at Taco Bell, and Taylor Farms de Mexico has issued a recall for iceberg lettuce. Additional investigation is ongoing.

Click here for Cyclosporiasis Fact Sheet & Food Safety

Cyclosporiasis is an intestinal illness caused by the Cyclospora parasite. The main symptom of infection is frequent, watery, explosive diarrhea; other symptoms include nausea, loss of appetite, cramping or intestinal pain, bloating, weight loss, vomiting and fatigue. Symptoms can appear anywhere from two days to two or more weeks after exposure, but in most cases, symptoms occur within one week of exposure.

Cyclospora exposure happens when someone consumes food or water that has been contaminated by the parasite. Outbreaks are commonly caused by contamination of fresh produce (fruits and vegetables). Cyclospora does not typically spread from person-to-person contact. The following fresh produce items have been linked to previous cyclosporiasis outbreaks:

* Bagged salad mixes and kits (pre-cut lettuce blends with romaine, iceberg, red cabbage, carrots)
* Fresh cilantro (coriander leaves)
* Fresh basil
* Raspberries
* Snow peas
* Green onions (scallions)

The Genesee County Health Department recommends the following actions in response to this outbreak:

• Wash all fresh produce under clean running water; scrub firm fruits and vegetables with a clean produce brush.
• Cook food when possible, as heating food to 158°F (70°C) kills Cyclospora.
• Seek medical care if you begin to experience symptoms of cyclosporiasis.
• Contact the Genesee County Health Department if you have questions or concerns about this outbreak (phone: 810-257-1017, email: GCHD-CD@geneseecountymi.gov).
GCHD provides services on behalf of the Genesee County Board of Commissioners. GCHD is committed to enhancing community well-being in Genesee County by preventing disease, promoting health, and protecting against environmental hazards. Our mission focuses on creating a healthier, safer environment for all residents.

Resources
MDHHS – Cyclosporiasis Outbreak Webpage
CDC – About Cyclosporiasis
CDC – Shredded iceberg lettuce served at Taco Bell locations is source of cyclosporiasis infections in five states
FDA – Taylor Fresh Foods Recalls Iceberg Lettuce from Central Mexico Because of Possible Health Risk
GCHD – Communicable Disease Program