This page provides information on current and recent infectious disease outbreaks in Michigan, including case counts, outbreak updates, and resources for the public and health care providers.

Cyclosporiasis Outbreak

MDHHS is investigating an outbreak of cyclosporiasis in Michigan. While the investigation is ongoing, available information indicates that lettuce or salad greens may be a potential source of this outbreak. However, other food items cannot be completely ruled out. No specific type of produce, grower, or supplier has been identified as the source.

MDHHS continues to work with local health departments and partners to investigate cases and provide updates as more information becomes available.

Michigan Case Counts

Total Cases: 11,234
Hospitalizations: As of July 30, 2026, 193 reported cases indicated they had been hospitalized.
Deaths: 2

Two deaths have been identified as part of the cyclosporiasis outbreak affecting Michigan. According to medical records, both individuals had significant underlying health conditions that may have been impacted by cyclosporiasis and dehydration. The two Michigan cases became ill prior to the voluntary recall of iceberg lettuce announced by U.S Food and Drug Administration on July 17.

No additional information will be provided on these two cases.

Cyclosporiasis is generally not a life-threatening illness. Death resulting from cyclosporiasis is uncommon in the United States.

Last updated: August 3, 2026

Data notes

• Case counts reflect all cases of cyclosporiasis reported during the outbreak investigation period and may change as additional information becomes available.
• Case counts reflect data reported through 9:30 a.m. Eastern Time.
• Total case counts are updated daily, Monday through Friday, by 11:00 a.m. Eastern Time.
• Hospitalization status and detailed outbreak data are updated weekly on Thursdays.

National cyclosporiasis case count information is available from CDC: Cyclosporiasis Surveillance.

News and Updates

• Recall Alert: Iceberg Lettuce from Central Mexico Because of Possible Health Risk (FDA) (July 18, 2026)
• Outbreak Advisory: Investigation of 5-State Outbreak of Cyclospora Illnesses: Iceberg Lettuce (FDA) (July 2026)
• Current Outbreak: Cyclospora Outbreak Linked to Shredded Iceberg Lettuce Served at Taco Bell in 5 States (CDC) (July 18, 2026)
• Health Advisory: Domestically Acquired Cyclosporiasis Cases in Multiple U.S. States (CDC) (July 14, 2026)
• Press Release: MDHHS updates recommendations for cyclosporiasis prevention (July 13, 2026)
• Press Release: MDHHS makes recommendations on preventing foodborne illness amid growing cyclosporiasis outbreak (July 4, 2026)
• Press Release: Outbreak of cyclosporiasis occurring in Michigan (July 1, 2026)
• Public Health Bulletin for Health Care Providers: Cyclosporiasis Outbreak in Southeast Michigan (July 2026)

Resources

• Cyclospora Outbreak Frequently Asked Questions (MDHHS)
• Cyclosporiasis What You Need to Know 2026 Outbreak (MDHHS)
• About Cyclosporiasis (CDC) - Learn more about cyclosporiasis, including symptoms, how it spreads, diagnosis, and treatment.
• Preventing Cyclosporiasis CDC - Learn steps to reduce the risk of cyclosporiasis and other foodborne illnesses.
• Cyclosporiasis - Provider Fact Sheet (CDC)
• Cyclosporiasis - Public Fact Sheet (CDC)
• Cyclosporiasis - Public Fact Sheet: Spanish (CDC)