Gone quiet · last update Oct 2, 2026 / United States Centers for Disease Control and Prevention
The 2026 US cyclospora outbreak, the largest on record
Overview · reviewed October 28, 2026
In the summer of 2026 the United States had its largest recorded outbreak of cyclosporiasis, an intestinal illness caused by the parasite Cyclospora cayetanensis that brings "explosive" diarrhea.[1][2] Federal investigators traced it to iceberg lettuce from a Taylor Farms facility in Mexico, which was supplied to Taco Bell among others.[3][4][5] When the Centers for Disease Control and Prevention declared the outbreak over in September, it counted nearly 13,000 cases and more than 500 hospitalizations; Michigan reported the first two deaths.[6][7] In October the Food and Drug Administration said it had found the parasite at the Mexican farm.[8]
Federal investigators traced it to iceberg lettuce from a Taylor Farms facility in Mexico, which was supplied to Taco Bell among others.[3][4][5] When the Centers for Disease Control and Prevention declared the outbreak over in September, it counted nearly 13,000 cases and more than 500 hospitalizations; Michigan reported the first two deaths.[6][7] In October the Food and Drug Administration said it had found the parasite at the Mexican farm.[8]
Coverage over time
LeftCenterRight
Weekly counts, outlets and reports (13 weeks with coverage)
| Week of (UTC) | Left | Center | Right | Of tracked | Share | Receipts |
|---|---|---|---|---|---|---|
| Oct 5, 2026 | 0 | 1 | 0 | 1 | under 1% | |
| Sep 28, 2026 | 4 | 7 | 4 | 15 | 3% | |
| Sep 7, 2026 | 16 | 37 | 11 | 64 | 13% | |
| Aug 31, 2026 | 1 | 1 | 1 | 3 | 1% | |
| Aug 24, 2026 | 5 | 16 | 3 | 24 | 5% | |
| Aug 17, 2026 | 0 | 10 | 0 | 10 | 2% | |
| Aug 10, 2026 | 3 | 8 | 1 | 12 | 2% | |
| Aug 3, 2026 | 23 | 52 | 15 | 90 | 17% | |
| Jul 27, 2026 | 15 | 40 | 8 | 63 | 11% | |
| Jul 20, 2026 | 34 | 72 | 25 | 131 | 23% | |
| Jul 13, 2026 | 36 | 80 | 33 | 149 | 27% | |
| Jul 6, 2026 | 11 | 36 | 7 | 54 | 10% | |
| Jun 29, 2026 | 2 | 19 | 4 | 25 | 4% |
Latest coverage
Background
By late June 2026, the CDC had counted 145 domestically acquired cyclosporiasis cases across 20 states, reported from May to mid-June.[2][9] Michigan announced an outbreak on July 1 after more than 170 cases in a few southeastern counties, and within two weeks it was reporting 2,640.[10] State data suggested that 2026 was already the worst year on record,[11] and Michigan officials said the illnesses might be tied to salad greens.[11] The FDA said it had been investigating five separate clusters since the parasite season began in May.[12]
Read the full background (2 more paragraphs)
In mid-July the FDA opened an investigation into iceberg lettuce supplied to Taco Bell, which pulled lettuce from some stores,[4] and Taylor Farms said it was removing all iceberg lettuce sourced from Taylor Farms de Mexico.[5] A lettuce sample first reported as positive turned out to be a false positive, but the FDA kept its focus on the supplier.[13] A Texas Army veteran sued Taco Bell, saying a meal in Ohio had put him in the hospital.[14] National case counts more than doubled in a week, to more than 4,100 in 41 states,[15] and about 1 in every 1,000 people in Michigan was infected.[1] Health Secretary Robert F. Kennedy Jr. said the outbreak was "under control,"[3] a claim former FDA commissioner Scott Gottlieb disputed,[16] and an FDA official insisted that "the U.S. food supply is safe."[17]
In early August Michigan reported the first two deaths, both in people with underlying health conditions.[7] Federal officials linked cases in 15 states to iceberg lettuce, out of at least 47 states that had reported cyclospora that year,[18] while other clusters with no identified source kept growing.[19][20] Sen. Elizabeth Warren wrote to Kennedy demanding answers about what she called a "calamitous" response.[21] The outbreak followed cuts to funding for state and local health departments,[22] and the AP reported that US regulators had been conducting fewer inspections of imported produce.[23] The CDC declared the outbreak over in September, and the FDA later reported finding cyclospora at the Mexican farm.[6][8]
Supporting stories (23)
- Cyclosporiasis outbreak in Michigan grows to more than 10,000 cases
- CDC monitors parasite outbreak that has sickened over 140 people across 17 states
- RFK Jr. says cyclosporiasis outbreak 'under control' amid 1,600 cases in 5 states
- Cyclospora parasite outbreak linked to Taco Bell lettuce in 5 states, CDC says
- Vegetable supplier Taylor Farms to pull some products amid cyclosporiasis outbreak
- Health officials declare end to largest cyclospora outbreak in history
- Two deaths linked to Cyclosporiasis in Michigan
- FDA finds potential source of cyclosporiasis outbreak linked to lettuce
- CDC investigates parasite that’s caused cases of ‘explosive’ diarrhea in 18 US states
- Cyclosporiasis Michigan outbreak: Cases rise to 5,002 Friday
- As cyclospora illnesses surge to a record, Michigan officials eye lettuce as a possible cause
- Federal health officials have investigated 5 different clusters of cyclosporiasis cases, FDA says
- Lettuce from Taylor Farms still focus of probe into cyclospora outbreak, FDA says
- Lawsuit alleges Taco Bell meal in Ohio caused Army veteran's cyclospora infection
- Kentucky health officials confirm rise in cyclosporiasis cases
- Cyclospora outbreak not under control yet, says former FDA commissioner
- Cyclospora boosts fears that deadlier foodborne outbreaks are ahead
- Is lettuce safe to eat now? What to know amid cyclospora outbreak
- More cases reported in cyclospora outbreak not linked to lettuce: FDA data
- Cyclospora outbreaks with no confirmed sources grow: FDA
- Sen. Warren demands answers from RFK Jr. over 'calamitous' response to cyclosporiasis outbreak
- Potential source of ‘explosive diarrhea’ parasite, cyclosporiasis, ID’d: report
- Cyclospora outbreak followed years of declining FDA foreign inspections
The full record
September 2026
August 2026
- Officials tie cyclospora outbreak involving iceberg lettuce to 3 more states
- DOH investigates Hawaii’s 1st locally acquired cyclosporiasis case
- As US's cyclosporiasis cases surpass 15,000, these are the hardest-hit states
- Cyclospora outbreaks with no confirmed sources grow: FDA
- Sen. Warren demands answers from RFK Jr. over 'calamitous' response to cyclosporiasis outbreak
- Cyclospora spreads through human waste — so how did it get on food?
- Arkansas reports 12 more cyclosporiasis cases, raising year’s total to 275
- Is lettuce safe to eat now? What to know amid cyclospora outbreak
- ADH: Illness causing 'explosive' diarrhea continues to spread in Arkansas, over 100 cases in Benton County
- New cyclosporiasis cases reported in northwest Ohio
- 2 die in connection with Michigan's cyclosporiasis outbreak
- Michigan's cyclosporiasis outbreak kills two people
- Two deaths linked to Cyclosporiasis in Michigan
- Cyclosporiasis linked to 2 deaths in Michigan
- 2 deaths reported in cyclosporiasis outbreak in Michigan as cases surpass 11,000
- Why cyclospora can be deadly for some people
July 2026
- CDC adds 6 new states to Cyclosporiasis outbreak, reports say
- Cyclospora outbreak clouds strong earnings for Taco Bell’s parent company
- Doctor warns against 'cyclospora skinny' trend
- Company at center of cyclospora outbreak complained about inspections, source says
- 1,100+ cases of explosive diarrhea illness cyclosporiasis reported in Indiana
- Michigan battles cyclosporiasis as it reels from Trump cuts
- Cyclosporiasis outbreak in Michigan grows to more than 10,000 cases
- Cyclospora outbreak not under control yet, says former FDA commissioner
- More than 18,200 cyclosporiasis cases now suspected in US: Where it's getting worse
- More cases reported in cyclospora outbreak not linked to lettuce: FDA data
- CDC deploying detectives to Ohio over cyclosporiasis
- Cyclospora boosts fears that deadlier foodborne outbreaks are ahead
- Mexico, RFK Jr., Taylor Farms weigh in on cyclospora outbreak
- Arkansas adds 44 cases of cyclosporiasis intestinal parasite disease in one week
- Cyclosporiasis outbreak hits Taco Bell sales, unlikely to cause lasting scar, analysts say
- Cyclosporiasis outbreak is a master class in miscommunication
- What is safe to eat during cyclosporiasis outbreak, according to a food safety expert
- NC cyclosporiasis cases surge past 500; health officials still looking for source
- What has made the cyclospora behind the US outbreak so challenging to trace?
- Another cyclospora outbreak not linked to lettuce under investigation: FDA
- RFK Jr. says cyclosporiasis outbreak 'under control' amid 1,600 cases in 5 states
- Federal health officials have investigated 5 different clusters of cyclosporiasis cases, FDA says
- MS officials urge buying local amid cyclosporiasis outbreak
- Fifth state linked to cyclosporiasis outbreak, investigation still focused on lettuce
- Cyclosporiasis vs. other food poisoning: How to spot the difference
- Clark County reports new case of cyclosporiasis during U.S. outbreak
- Kentucky health officials confirm rise in cyclosporiasis cases
- Lettuce from Taylor Farms still focus of probe into cyclospora outbreak, FDA says
- FDA still focused on lettuce supplier as source of parasite, despite faulty test result
- Lawsuit alleges Taco Bell meal in Ohio caused Army veteran's cyclospora infection
- Cyclosporiasis outbreak hits Taco Bell sales
- California farm company identified as possible cyclosporiasis outbreak source: Reports
- Vegetable supplier Taylor Farms to pull some products amid cyclosporiasis outbreak
- Cyclospora parasite outbreak linked to Taco Bell lettuce in 5 states, CDC says
- Health officials warn cyclosporiasis symptoms can relapse
- Why experts can't pinpoint source of 'explosive diarrhea' parasite
- Cyclospora outbreak linked to fast-food lettuce in 5 states
- The foods most likely to carry diarrhea-causing parasite cyclospora (and which are safe)
- Chicago consumers react to potential cyclosporiasis outbreak source linked to Taco Bell ID'd by FDA
- Can vinegar kill cyclospora? How to wash produce amid parasite outbreak
- Cyclosporiasis outbreak: Michigan officials identify leading suspected source of 'explosive' diarrhea parasite
- Local farms increase safety amid Cyclospora outbreak
- Salad greens scrutinized as cyclosporiasis outbreak spreads
- Cyclosporiasis Michigan outbreak: Cases rise to 5,002 Friday
- As cyclospora illnesses surge to a record, Michigan officials eye lettuce as a possible cause
- Potential source of ‘explosive diarrhea’ parasite, cyclosporiasis, ID’d: report
- Four states linked to cyclosporiasis outbreak, CDC warns more could be involved
- Cyclosporiasis symptoms, treatment and how it's spread: Everything to know about the intestinal parasitic disease
- 200+ cases of diarrhea-causing parasite in North Carolina
- Cyclosporiasis outbreaks: What to know about the foodborne illness and symptoms
- Cyclosporiasis: California now reporting cases of parasite causing 'explosive diarrhea'
- CDC investigates parasite that’s caused cases of ‘explosive’ diarrhea in 18 US states
- CDC seeks source of parasitic outbreak linked to 'explosive' diarrhea in multiple states
Coverage & sources
Read the reports, see how much was collected over time, or compare outlets by political leaning.