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Infectious Disease Outbreaks

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.

Active Outbreaks

There are currently no outbreaks listed in this section. Information about previous outbreaks is available below.

Previous Outbreaks

Cyclosporiasis  — 2026

The Centers for Disease Control and Prevention (CDC) declared the multistate cyclosporiasis outbreak linked to iceberg lettuce over on Sept. 11, 2026. The U.S. Food and Drug Administration (FDA) closed its investigation into the outbreak on Oct. 2, 2026. The information below summarizes cyclosporiasis cases reported in Michigan during the 2026 season, including cases associated with the multistate outbreak and cases not linked to the multistate outbreak.

Michigan 2026 Season Summary

A total of 15,472 cases of cyclosporiasis were reported in Michigan with symptom onset or laboratory collection dates from May 1 through Aug. 31, 2026.

These case counts are provisional. Case classifications are still being finalized, including ongoing review of cases for potential association with the multistate outbreak.

Season at a glance

Count Descriptions
Cases 15,472 Case reported during the 2026 season.
Hospitalizations 379
Cases with reported hospitalizations.
Deaths 2
Cyclosporiasis-associated deaths.
Cases Interviewed 7, 650 (49%)
Cases for which interviews were completed.


Case Characteristics

  • Median age: 43 years
  • Age range: 1- 101 years
  • Female: 55%
  • Pediatric cases: younger than 18 years accounted for 4% of all cases.

Final update: October 19, 2026 

    Epidemiologic Curves and News

    Salmonella Outbreak

    MDHHS is aware of a multistate Salmonella Javiana outbreak. For additional information about the outbreak, including case updates, investigation details, and recall information, see the CDC and FDA advisories below.

    News

    Resources