Michigan Now Says Lettuce or Salad Greens May Be Behind the Cyclospora Outbreak as Cases Top 3,000

Michigan well being officers mentioned in the present day that lettuce or salad greens will be the supply of the Cyclospora outbreak that has now sickened greater than 3,000 individuals throughout Michigan and Ohio, the primary time investigators have pointed to a particular meals class because the outbreak started in late June.

Michigan’s Division of Well being and Human Companies introduced on July 13, 2026 that its investigation, which concerned greater than 1,000 affected person interviews carried out by state well being employees, has pointed to lettuce as a meals that “repeatedly comes up” in these interviews. The state instantly certified the discovering: no particular sort of produce, grower, or provider has been recognized because the supply, and different meals gadgets can’t be utterly dominated out.

“Though we should not have a particular product recognized because the supply of the outbreak, we wish to let Michiganders know what we’ve got realized thus far to allow them to take steps to guard their households,” Dr. Natasha Bagdasarian, Michigan’s chief medical government, mentioned in a July 13 MDHHS assertion. “Early data has proven lettuce as a typical product that repeatedly comes up throughout the investigation.”

As of Monday morning, Michigan has reported 2,640 confirmed circumstances, together with 44 hospitalizations. Ohio has reported 361 circumstances since June 1. An NBC Information tally of state well being departments put the nationwide whole above 4,000 as of July 13, although the CDC’s confirmed rely — final up to date July 9 — stood at 843 circumstances throughout 31 states, reflecting a multi-week lag in federal reporting.

No meals recall has been issued. There isn’t any particular model, provider, or product for customers to search for or discard.

Why This Issues

The lettuce discovering adjustments the sensible steerage for tens of millions of People in a significant means — not as a result of a recall has been issued, however as a result of it offers customers a particular meals class to deal with extra rigorously whereas the investigation continues.

Pre-washed packaging doesn’t assure security, and rewashing bagged lettuce is unlikely to take away Cyclospora. The parasite produces oocysts — protecting shells — that cling to supply surfaces and can’t be dislodged or killed by water alone, nonetheless totally utilized. The usual food-safety step most People depend on — working produce beneath faucet water earlier than consuming — gives no safety towards Cyclospora.

This makes the outbreak structurally totally different from most bacterial foodborne outbreaks, the place washing, thorough cooking, and refrigeration supply significant safety. For Cyclospora, the one dependable kill step is warmth: cooking to not less than 158 levels Fahrenheit (70°C).

Anybody who has eaten salad, salad kits, or recent lettuce in Michigan, Ohio, or one other affected state previously two to 4 weeks and has developed persistent diarrhea ought to contact a health-care supplier — and particularly request Cyclospora testing.

What We Know So Far

This outbreak has grown to a dimension that exceeds all historic norms for Cyclospora in the US. Michigan usually sees roughly 50 circumstances of cyclosporiasis yearly. The 2026 whole — 2,640 circumstances in Michigan alone — represents greater than 50 instances the annual common. The 2026 outbreak has already surpassed all of 2025, when the US recorded roughly 2,700 cyclosporiasis circumstances for the complete season.

The investigation is difficult by a number of structural elements Dr. Bagdasarian recognized in her assertion. Produce might have been grown in different elements of the nation or internationally, processed elsewhere, after which distributed by suppliers serving a number of grocery shops and restaurant chains. Cyclospora additionally has a one-to-two-week incubation interval, which means sufferers are being requested to recall meals from two to 6 weeks in the past. Genomic matching — the approach used to quickly hyperlink Salmonella and E. coli circumstances throughout states — shouldn’t be but as nicely developed for Cyclospora.

Michigan confirmed there may be presently no proof linking leisure water actions to this outbreak. Investigators proceed to deal with contaminated produce because the seemingly supply.

Surveillance information have additionally been weakened by a coverage change. Earlier than July 1, 2025, the CDC’s Foodborne Ailments Lively Surveillance Community (FoodNet) collected information on eight pathogens, together with Cyclospora. It now collects information on solely two — Salmonella and E. coli — making the nationwide surveillance internet much less strong for this pathogen. Former CDC Director Dr. Robert Redfield advised CNN on Monday that “surveillance is form of the important thing to early identification” and that reducing these packages shouldn’t be within the nation’s curiosity.

The place the Danger Is Highest

Michigan has essentially the most confirmed circumstances of any state — 2,640 as of July 13. Ohio has reported 361 circumstances since June 1, with not less than 46 hospitalizations. The CDC’s July 9 replace confirmed 31 states reporting home circumstances, although federal officers acknowledged the rely considerably lags state totals.

Earlier U.S. and Canadian Cyclospora outbreaks have been linked to bagged salad mixes, recent cilantro, recent basil, raspberries, snow peas, and inexperienced onions. Any of these meals — in addition to lettuce — must be handled with further warning whereas the investigation continues.

Some eating places have voluntarily pulled sure recent substances from their menus whereas the investigation continues. These measures are voluntary and have been confirmed by Dr. Bagdasarian. No obligatory recall or elimination order has been issued.

What Docs and Consultants Say

Dr. Natasha Bagdasarian urged the general public on July 13 to request nationwide coordination: “We actually want that type of coordination to occur on the nationwide stage. As quickly as different states get their numbers to the CDC, we hope they will take a broader look to see whether or not these outbreaks are associated.”

Dr. Kiran Joshi with the Cook dinner County Division of Public Well being described the hallmark symptom as diarrhea that “might be actually frequent, fairly extreme”— together with what sufferers describe as explosive diarrhea — accompanied by stomach signs comparable to lack of urge for food, nausea, vomiting, and typically a low-grade fever.

Jennifer McEntire, a microbiologist and CEO of Meals Security Methods, advised CNN that tracing Cyclospora is much more durable than tracing bacterial pathogens as a result of the genomic sequencing instruments that work effectively for micro organism are far much less developed for this parasite. She in contrast the problem to studying “Conflict and Peace” versus a kids’s e book.

Dr. Ambreen Malik, an infectious illness specialist on the College of Michigan Well being Sparrow, famous that the scale of the nationwide meals distribution community compounds the tracing problem considerably.

What the Proof Reveals and What It Does Not

MedicalDaily Shopper Alert Verify

Confirmed circumstances as of July 13: Michigan 2,640 (44 hospitalizations); Ohio 361; NBC Information nationwide tally above 4,000
CDC confirmed circumstances (July 9 information): 843 throughout 31 states — acknowledged undercount on account of reporting lag
Suspected meals car: Lettuce or salad greens (preliminary, based mostly on affected person interviews — not confirmed by laboratory testing of particular product)
Particular sort, grower, or provider recognized: No
Recall issued: No
Water contamination hyperlink: No — investigators have dominated out leisure water
What the proof doesn’t but show: Which particular lettuce product, provider, or distribution chain is contaminated; whether or not the Michigan and Ohio outbreaks are a part of the identical supply because the broader nationwide outbreak
What readers ought to do: Deal with all recent lettuce and salad greens with elevated warning utilizing the particular steps beneath

Who Faces the Best Danger?

All residents of Michigan, Ohio, and neighboring states who’ve not too long ago consumed recent salad greens or lettuce are at potential publicity danger. Teams going through essentially the most extreme sickness if contaminated embody:

Older adults and younger kids, who face greater charges of dehydration from extended diarrhea
Organ transplant recipients and folks present process chemotherapy
Individuals with weakened immune techniques who might develop extra extreme or extended sickness
Individuals with out handy entry to main care, who might not obtain the particular diagnostic check required

Signs and Warning Indicators to Watch For

Signs usually seem one to 2 weeks after publicity. The hallmark symptom is frequent, watery diarrhea — typically described as explosive — which will proceed for weeks with out remedy. Extra signs embody lack of urge for food, stomach cramps, bloating, nausea, vomiting, and low-grade fever. Not like many intestinal sicknesses, cyclosporiasis doesn’t resolve shortly with out antibiotic remedy.

Search medical analysis and particularly request Cyclospora testing for:

Diarrhea lasting greater than three days
Indicators of dehydration: dizziness, dry mouth, decreased urination, darkish urine
Extreme stomach cramping or incapability to maintain fluids down
Signs returning after preliminary enchancment — relapse is frequent with out remedy

Customary stool panels and cultures won’t detect Cyclospora. Inform your physician you might be involved about Cyclospora and request modified acid-fast staining or PCR testing particularly.

What You Can Do Now

Purchase complete heads of lettuce somewhat than pre-washed bagged lettuce or pre-mixed salad kits. Michigan well being officers issued this suggestion straight in the present day. Entire heads scale back the chance of cross-contamination from processing.
Discard the outer two to 3 layers of leaves from a complete head of lettuce earlier than preparation, and wash the internal leaves totally beneath working water.
Cook dinner greens when attainable. Heating lettuce or different greens to not less than 158°F (70°C) kills Cyclospora — the one dependable kill step accessible.
For herbs comparable to cilantro, basil, and inexperienced onions, separate leaves and wash totally; trim the foundation finish of inexperienced onions and peel again the outer layer earlier than washing.
You probably have not too long ago eaten recent salad greens or lettuce and develop persistent watery diarrhea, contact your health-care supplier and particularly request Cyclospora testing — not an ordinary stool tradition.
Monitor the CDC’s Cyclospora surveillance web page and the FDA’s outbreak investigations desk for any product recall or shopper advisory.
Don’t use dish cleaning soap or produce wash on recent produce — residual chemical compounds could cause gastrointestinal irritation.

Price and Entry: What Sufferers Ought to Know

Cyclosporiasis is handled with the antibiotic trimethoprim-sulfamethoxazole (Bactrim or Septra). Generic variations are broadly accessible and usually value beneath $20 for the standard course with a prescription. Sufferers who’re allergic to sulfa medication ought to seek the advice of an infectious illness specialist.

For sufferers with out insurance coverage, Federally Certified Well being Facilities supply sliding-scale care — discover one at findahealthcenter.hrsa.gov. Michigan residents can contact the MDHHS at 1-888-535-6136. Ohio residents can contact the Ohio Division of Well being at 1-800-282-5616.

What Occurs Subsequent

Michigan state employees will proceed affected person interviews and laboratory testing to slim the produce supply. The FDA is conducting traceback investigations as information are compiled. If a particular provider or product is recognized, a public shopper advisory and voluntary or obligatory recall would observe.

The CDC’s Cyclospora surveillance season runs via August 31, with peak exercise anticipated via mid-summer. The official case rely is anticipated to rise sharply when the subsequent federal replace is revealed. MedicalDaily will replace this text instantly when a particular product supply is recognized or a recall is issued.

The Backside Line

Michigan well being officers in the present day named lettuce or salad greens because the suspected meals car within the worst Cyclospora outbreak the US has seen in many years — based mostly on greater than 1,000 affected person interviews. No particular product has been recognized, no recall has been issued, and different meals can’t be dominated out. However customers in Michigan, Ohio, and all 31 affected states now have actionable steerage for the primary time: purchase complete heads of lettuce as a substitute of pre-washed luggage, discard outer leaves, prepare dinner greens when attainable, and search Cyclospora-specific testing in the event you develop persistent watery diarrhea.