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5 clusters · 115 sources · 10 days · First seen · Last updated

Categories: HEALTH

Cyclospora outbreak persists, Michigan epicenter

Overview

CDC data released on July 10 2026 show that the Cyclospora outbreak that began in southeastern Michigan last summer continues to expand. Michigan health officials have confirmed 1,562 laboratory‑verified infections, 44 hospitalizations and no deaths, making it the state’s largest cyclosporiasis event on record. Nationwide, the CDC now reports over 2,800 confirmed cases across 32 states and an additional 1,500 suspected cases under investigation.

The source of contamination remains unidentified; whole‑genome sequencing of parasite isolates and traceback investigations are ongoing, with fresh produce—particularly leafy greens, herbs and berries—still the primary suspect. Public‑health guidance remains unchanged: wash all fruits and vegetables thoroughly, discard damaged portions, avoid pre‑washed bagged salads when possible, and cook vegetables to at least 70 °C (158 °F). High‑risk groups are urged to stay vigilant. Treatment continues to be a short course of trimethoprim‑sulfamethoxazole, with emphasis on hydration to prevent dehydration complications. No fatalities have been recorded to date.

Timeline

  1. about 17 hours ago

    [HEALTH] 26 sources
    Cyclospora Outbreak Infects >1,500 in Michigan, Spreads to 31 US States

    Michigan reports 1,562 Cyclospora cases; the outbreak has spread to 31 U.S. states with over 2,800 confirmed infections. No source identified; CDC urges thorough produce washing and cooking.

  2. 3 days ago

    [HEALTH] 48 sources
    Cyclospora Outbreak Sweeps U.S., Michigan Leads With Nearly 1,000 Cases

    A Cyclospora outbreak has infected over 1,000 people in at least 29 U.S. states, with Michigan reporting nearly 1,000 cases. No deaths, but dozens hospitalized; source unclear, likely contaminated fresh produce

  3. 5 days ago

    [HEALTH] 25 sources
    Michigan Cyclospora Outbreak Spreads to Multiple US States

    A Cyclospora outbreak has topped 1,000 US cases, with Michigan alone exceeding 700. Officials suspect contaminated fresh produce but have not identified a source; symptoms are severe watery diarrhea, and health

  4. 8 days ago

    [HEALTH] 2 sources
    CDC Reports Over 400 Cyclospora Cases Across 18 U.S. States

    CDC investigates a Cyclospora outbreak causing over 400 cases of explosive diarrhea in 18 U.S. states, with Michigan reporting >300 cases and New York 107; authorities urge washing produce and monitor sources.

  5. 10 days ago

    [HEALTH] 24 sources
    Michigan sees over 300 cyclosporiasis cases as outbreak spreads across the US

    Michigan reports >300 cyclosporiasis cases, the U.S. outbreak tops 400 with no source pinpointed; CDC and state agencies investigate.

Sources

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