Coverage dated July 6, 2026 to July 12, 2026

Outbreak of diarrhea caused by cyclosporiasis spreading in US with cases reported in CA, CDC says

Headline from ABC 7 San Francisco, on the newest of 6 developments

Cases of cyclosporiasis, an intestinal infection caused by a parasite, are currently being reported in nearly three dozen states, according to an ABC News tally, including California. The most common symptom of cyclosporiasis is watery diarrhea "with frequent and sometimes explosive bowel movements,…

ABC 7 San Francisco's own description from its feed. We collect headlines and these descriptions, not full articles; read the original reporting below.

Earlier updates in this story

Developments in this update

6 dated developments, oldest first, newest marked. Each is named by one outlet's own headline; open its reports to see every outlet that covered it.

  1. CDC warns of rising parasite infections with a horrifying symptom: 2026 cyclosporiasis outbreak spreads

    Headline from Fast Company ·

  2. Number of cyclosporiasis cases in Michigan rises to over 700

    Headline from The Brunswick News ·

  3. Cyclosporiasis outbreak: Michigan case count tops 1,500

    Headline from Fox2 Detroit ·

  4. What is cyclosporiasis, the ‘explosive diarrhea' parasite infection tied to produce?

    Headline from NBC Boston ·

  5. 175+ diarrhea parasite cases confirmed in Ohio

    Headline from FOX 8 Cleveland ·

  6. Newest

    Outbreak of diarrhea caused by cyclosporiasis spreading in US with cases reported in CA, CDC says

    Headline from ABC 7 San Francisco ·

7 reports not tied to one development ·

Read the reports

Reports & sources

176 articles, oldest first.

  1. Texas Standard

    What to know about the foodborne parasite outbreak in Texas (opens Texas Standard)

    Published

    Texas Standard's feed description

    Cases of cyclosporiasis, an infection caused by microscopic parasites, are being tracked in the state. Here’s what to know and how to avoid this nasty stomach tourist.

  2. News Nation Now

    Which states has the 'explosive' diarrhea parasite been reported (opens News Nation Now)

    Published

    News Nation Now's feed description

    Outbreaks of cyclosporiasis have been reported in at least 17 states.

  3. KSNT Topeka

    'Explosive' diarrhea parasite cases surge as health officials seek source (opens KSNT Topeka)

    Published

    KSNT Topeka's feed description

    Outbreaks of cyclosporiasis are typically traced back to prepackaged food and fresh produce.

  4. KVUE

    North Texas counties confirm cyclosporiasis cases; explosive diarrhea parasite linked to infections as summer begins (opens KVUE)

    Published

    KVUE's feed description

    Symptoms of the parasite include cramping, bloating and loss of appetite.

  5. The Guardian

    Multiple US states see alarming increase in cases of parasitic illness that causes ‘explosive’ diarrhea (opens The Guardian)

    Published

    The Guardian's feed description

    Almost 700 cases were reported to Michigan health department by Monday, up from 170 six days earlier Cases of cyclosporiasis – a parasitic illness that causes “explosive”, watery diarrhea – have grown exponentially in recent days, health officials said, with an abnormally large outbreak reported in …

  6. 10TV Columbus

    Cases of 'explosive' diarrhea parasite continue to rise, but officials aren't sure what's causing it (opens 10TV Columbus)

    Published

    10TV Columbus's feed description

    Cyclosporiasis is a parasitic infection that causes explosive diarrhea and intestinal infection. There have been cases reported in 18 states so far this year.

  7. KTLA Los Angeles

    Cases of 'explosive' diarrhea parasite surge across U.S. (opens KTLA Los Angeles)

    Published

    KTLA Los Angeles's feed description

    Health officials have yet to find the source of a parasitic illness hitting more than a dozen states that is causing severe symptoms such as "explosive" diarrhea. The Centers for Disease Control and Prevention first learned of large clusters of cyclosporiasis in early May.

  8. FOX 35 Orlando

    Cyclosporiasis in Florida: List of foods linked to some outbreaks (opens FOX 35 Orlando)

    Published

    FOX 35 Orlando's feed description

    A Cyclosporiasis outbreak across the U.S. continues, and Florida is among more than a dozen states that have reported cases of the parasite that can cause explosive diarrhea. Health officials in Michigan released new information this week about an outbreak in its state, including a list of fruits an…

  9. WZZM Grand Rapids

    6 cases of parasite linked to 'explosive' diarrhea confirmed in Ionia County (opens WZZM Grand Rapids)

    Published

    WZZM Grand Rapids's feed description

    Across Michigan, nearly 600 cyclosporiasis cases have been reported. The parasite often causes watery diarrhea, stomach cramps, nausea and loss of appetite.

  10. Fox2 Detroit

    Cyclosporiasis cases spike over 700 in Michigan as MDHHS hunts for source (opens Fox2 Detroit)

    Published

    Fox2 Detroit's feed description

    The number of people sickened by the viral parasitic infection instigating gastrointestinal symptoms in Michigan has climbed to more than 700 cases, the health department confirmed on Tuesday. In an email from MDHHS Spokesperson Lynn Sutfin, the latest figures are as of 4:30 p.m. on July 6.

  11. Fox7 Austin

    Cyclosporiasis in Texas: What to know and what you can do (opens Fox7 Austin)

    Published

    Fox7 Austin's feed description

    Texas is reporting dozens of cases of Cyclosporiasis, which is a disease caused by a parasite that can result in explosive diarrhea. Texas is one of 17 states reporting cases. The parasite is not new. There tend to be spikes in the summer, and it is mostly spread through produce contaminated by fece…

  12. Denver Gazette

    ‘Explosive’ diarrhea among symptoms as parasitic illness hits Colorado (opens Denver Gazette)

    Published

    Denver Gazette's feed description

    A fecal parasite that can contaminate food and water is causing “explosive” diarrhea across more than a dozen states, including Colorado, health officials said Tuesday. Preliminary data show Colorado has recorded 90 cases of cyclosporiasis since January, Hope Shuler, a spokesperson for the Colorado …

  13. MedicalXpress

    Michigan and other states see unusual spike in parasite that causes 'explosive' diarrhea (opens MedicalXpress)

    Published

    MedicalXpress's feed description

    A parasite that causes severe, watery diarrhea is spreading across the United States, and health officials in Michigan are racing to explain an unusual surge in cases.

  14. Fox32 Chicago

    Cyclosporiasis in Illinois: Cases are higher than average. Here's how to avoid getting sick (opens Fox32 Chicago)

    Published

    Fox32 Chicago's feed description

    Illinois health officials are reporting a higher-than-average number of cyclosporiasis cases and are urging residents to take precautions as federal and state agencies investigate a nationwide increase in infections.

  15. The Brunswick News

    Number of cyclosporiasis cases in Michigan rises to over 700 (opens The Brunswick News)

    Published

    The Brunswick News's feed description

    The number of cyclosporiasis cases in Michigan has risen to over 700 as public health officials ask the public to take steps to protect themselves during the outbreak. Dr. Natasha Bagdasarian, the state's chief medical executive, said Michigan has seen…

  16. KVUE

    What to know as cases of explosive diarrhea parasite cyclospora rise across Texas (opens KVUE)

    Published

    KVUE's feed description

    Doctors say symptoms often do not appear for about a week, making it difficult for many people to connect their illness to contaminated food.

  17. Fast Company

    CDC warns of rising parasite infections with a horrifying symptom: 2026 cyclosporiasis outbreak spreads (opens Fast Company)

    Published

    Fast Company's feed description

    Here’s something you don’t see everyday: Local health officials are warning Americans to be on the lookout for cyclosporiasis, a parasitic infection that causes “explosive” diarrhea—yes, we said it—and has sickened nearly 700 people in the at least two U.S.

  18. Money Talks News

    How Dangerous Is Cyclosporiasis, ‘Poop Parasite’ (opens Money Talks News)

    Published

    Money Talks News's feed description

    Cases of a diarrhea-causing intestinal parasite are climbing nationwide, and untreated symptoms can drag on for a month.

  19. Fox2 Detroit

    Cyclosporiasis outbreak in Michigan: Latest case numbers near 1K mark (opens Fox2 Detroit)

    Published

    Fox2 Detroit's feed description

    The illness is described as having "a two-week case of diarrhea," said Doctor Joel Kammeyer from the Detroit Medical Center.

  20. New York Post

    NYC cases of ‘explosive diarrhea’ parasite soar to 273 — 3 times as many as previously reported for the whole state (opens New York Post)

    Published

    New York Post's feed description

    The Post has exclusively learned that New York City has had 301 cases of cyclosporiasis this year, while the state has recorded an additional 125 cases, excluding the city.

  21. WLNS Lansing

    Michigan officials work to find parasitic illness outbreak cause as cases near 1,000 (opens WLNS Lansing)

    Published

    WLNS Lansing's feed description

    Health officials have yet to identify the source of cyclosporiasis outbreak as cases across the state near the 1,000 mark.

  22. The Brunswick News

    Michigan officials race to find cause of parasitic outbreak as cases near 1,000 (opens The Brunswick News)

    Published

    The Brunswick News's feed description

    DETROIT — State health officials are trying to pinpoint the source of a growing parasitic outbreak in Michigan, contacting all people who have tested positive for cyclosporiasis as cases near 1,000. Since the outbreak started June 22, 992 reports of…

  23. WISH-TV Indianapolis

    Marion County sees surge in ‘explosive diarrhea’ cases (opens WISH-TV Indianapolis)

    Published

    WISH-TV Indianapolis's feed description

    Indianapolis and Marion County have seen an increase in confirmed cases of Cyclospora, also known as "explosive diarrhea," with 15 cases reported so far in 2026. Michigan has experienced the largest outbreak in state history, with 992 cases reported.

  24. Myarklamiss

    Reported cases of parasitic illness that can cause ‘explosive’ diarrhea found in Louisiana (opens Myarklamiss)

    Published

    Myarklamiss's feed description

    LDH is investigating a preliminary number of cyclosporiasis cases which can cause "explosive" diarrhea among other symptoms.

  25. WMUR

    What we know about past outbreaks linked to cyclospora, a parasite that lead to ‘explosive diarrhea’ (opens WMUR)

    Published

    WMUR's feed description

    The parasite behind “explosive diarrhea” is on the rise, with cases reported in 17 states and produce like parsley, cilantro and salad mixes among the foods to watch.

Showing the first 25 of 72 headlines. ·

Identical headlines usually mean shared wire copy. They are counted as separate articles but are not independent confirmation.

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