Michigan Ends Lettuce Warning After Record Cyclosporiasis Wave

Michigan health officials told residents Thursday they can return to bagged salads and normal produce habits after logging 12,485 cyclosporiasis cases since June, the heaviest toll of any state in the largest U.S. outbreak of the parasite on record. New case reports are slowing and diarrhea-related emergency visits are trending down, the Michigan Department of Health and Human Services said.

The department still urges people to stay clear of recalled iceberg lettuce. Most exposures appear to have happened in late June to early July, and the contaminated product is largely off the market.

The Numbers That Broke Every Prior Record

Michigan’s count alone exceeds the previous U.S. record for a single cyclosporiasis outbreak, which stood near 1,500 cases linked to raspberries years earlier. Nationally, the CDC has tallied 10,468 laboratory-confirmed domestic cases since May 1, plus more than 12,000 additional reports still under review.

A multistate cluster tied to one supplier accounts for a large but incomplete share of the total.

• 12,485 Michigan cases reported through Aug. 6
• 279 hospitalizations in the state
• 2 deaths in Michigan, both in people with significant underlying conditions
• 6,358 confirmed illnesses in the Taylor Farms-linked multistate outbreak across 15 states

CDC data put at least 278 hospitalizations in that linked cluster. Michigan’s full tally includes both the linked cases and a broader surge whose exact sources remain under investigation.

Wayne County led Michigan with 1,794 cases, followed by Oakland (1,344) and Washtenaw (1,028). Adults ages 30-39 formed the largest age group.

Why Officials Lifted the Warning This Week

Cyclospora’s average incubation runs about seven days, sometimes stretching to 14. With most people sickened after exposures in late June and early July, fresh case reports have decelerated and emergency-department visits for diarrhea have fallen.

“As new data has emerged, our guidance has evolved to reflect the best available evidence,” said Dr. Natasha Bagdasarian, Michigan’s chief medical executive. The department said residents can resume routine guidance for lettuce and salad greens and make choices based on personal risk tolerance. Reporting of outbreak data shifts to a weekly Thursday cadence.

1. June 22, 2026, Earliest illness onsets tied to the multistate cluster begin.
2. July 17, 2026, Taylor Farms de Mexico voluntarily recalls all iceberg lettuce from central Mexico; Taco Bell and other customers stop using it.
3. July 31, 2026, Last reported illness onset in the CDC-linked outbreak.
4. Aug. 3, 2026, Michigan announces the first two deaths linked to the broader outbreak.
5. Aug. 5-6, 2026, CDC and FDA update the linked cluster to 6,358 cases; Michigan lifts the bagged-salad precaution.

The timing matches the biology. Once the contaminated lots left shelves and restaurants, new infections had a natural endpoint.

The Lettuce Trail From Mexico to Michigan Menus

Epidemiologic interviews and traceback pointed to shredded iceberg lettuce grown in central Mexico and processed by Taylor Farms de Mexico. Sick people frequently reported eating at Taco Bell locations that received the product. Ingredient analysis of Michigan cases who ate there found iceberg lettuce in roughly 90 percent of meals.

On July 17 Taylor Farms began a voluntary removal of all central-Mexico iceberg lettuce from the U.S. market. The Taylor Farms de Mexico iceberg lettuce recall covered multiple package types sold to food-service customers across more than two dozen states and Marketside-brand 12-oz and 24-oz iceberg salad plus 8-oz and 16-oz shredded lettuce at select Walmart stores, with best-by dates into early August.

• Food-service distribution reached AL, AR, CT, FL, GA, IA, IL, IN, KS, KY, LA, MA, MD, MI, MO, MS, NC, NH, NJ, NY, OH, OK, PA, SC, TN, TX, VA, WI and WV.
• Retail Marketside packs appeared at select Walmarts in a shorter list of southern and midwestern states.
• Taco Bell locations in at least 13 states received the product; the chain said it stopped using Taylor Farms de Mexico lettuce as of the recall date.

Many illnesses started before the recall. CDC notes the true number is higher because some people never seek testing and recent cases take weeks to confirm. Michigan’s investigation still lists lettuce or salad greens as a potential source for the full state surge but has not named one grower or type as the sole cause. An earlier retracted positive test on Taylor Farms product added temporary confusion without altering the epidemiologic link.

Separately, Taco Bell stopped serving the implicated lettuce once the connection became clear, a step that cut one major exposure route in the hardest-hit region.

Who Bore the Brunt Across Michigan Counties

Southeast Michigan absorbed the heaviest share. Wayne, Oakland, Macomb, Washtenaw and Genesee counties alone account for thousands of cases. Rural northern counties reported single or low double-digit totals.

Age data show working-age adults hit hardest: 2,615 cases in the 30-39 group, 2,258 in 40-49, and 2,209 in 20-29. Children under 10 accounted for only 79 cases. Four cases lacked age data and nine lacked county of residence.

Both deaths involved people with significant underlying health conditions that may have been worsened by the infection and dehydration. Death from cyclosporiasis remains uncommon in the United States.

How This Year Compares With Earlier U.S. Outbreaks

CDC and USDA historical summaries put the previous high-water mark near 1,500 cases in a raspberry-linked outbreak. Most documented foodborne cyclospora clusters from 2000-2014 produced a median of about 20 cases; the largest then reached 582. Between 2018 and 2021 roughly 6,000 domestically acquired cases were tracked across multiple years combined.

By mid-July 2026 the CDC had already logged more than 1,600 confirmed domestic cases for the season, far above the 249 reported in the same window of 2025. The multistate lettuce cluster alone later passed 6,000. Michigan’s single-state total of 12,485 sits in a different category entirely.

Some public-health voices have noted that Cyclospora was among pathogens dropped from mandatory FoodNet surveillance the prior year amid budget pressure. Whether that change delayed cluster detection remains debated; what is clear is that once cases accelerated, Michigan’s local investigation and national traceback still identified a major vehicle within weeks.

Since the start of this outbreak, MDHHS has remained committed to providing timely, transparent information and clear recommendations to Michigan residents.

Dr. Natasha Bagdasarian, chief medical executive, said the department’s guidance changed only when the evidence supported it.

What Still Stands After the Bagged-Salad Advice Ends

The lift applies only to the broad precaution against bagged mixes. Recalled product remains off-limits. CDC continues to investigate other unrelated cyclospora clusters nationwide.

What We Know

• Most Michigan exposures occurred late June to early July; contaminated lots are largely gone.
• Iceberg lettuce from Taylor Farms de Mexico is the vehicle for the 15-state cluster of 6,358 cases.
• Incubation averages seven days; symptoms can relapse without treatment.
• Trimethoprim-sulfamethoxazole is the usual antibiotic; hydration matters.

What Remains Unconfirmed

• Whether additional produce items contributed to Michigan’s full 12,485-case tally beyond the linked lettuce.
• Exact contribution of any surveillance changes to the outbreak’s size or speed of recognition.
• Final national totals once all lagging lab reports are resolved.

Michigan still advises buying whole heads when possible, discarding outer leaves, and washing inner leaves under running water. Cooking greens to 158°F kills the parasite. Washing alone does not guarantee removal. An unrelated salmonella outbreak linked to jalapeños has sickened a small number of Michigan residents in the same period.

Crowd conversation on the lift mixed relief with dark humor that case drops partly reflect people simply quitting lettuce for weeks. That behavioral shift likely helped. The official message is narrower: the main contaminated stream has exited the supply chain, so the acute risk has fallen enough to restore ordinary habits while the recalled product stays discarded.

The largest cyclosporiasis wave the country has recorded is moving into its resolution phase in the hardest-hit state. The numbers will keep ticking upward for a few more weeks from reporting lag, but the warning that defined the summer for Michigan salad eaters has been withdrawn.

Frequently Asked Questions

What is cyclosporiasis and how does someone get it?

Cyclosporiasis is an intestinal illness caused by the parasite Cyclospora cayetanensis. People become infected by swallowing the parasite, almost always through contaminated food or water; it does not spread directly person-to-person. Fresh produce such as lettuce, herbs and berries has been the usual vehicle in U.S. outbreaks.

How long do cyclosporiasis symptoms last and what is the treatment?

Symptoms typically begin about a week after exposure and can include watery diarrhea, loss of appetite, weight loss, cramps, bloating, nausea and fatigue. Untreated illness can last days to a month or longer and may relapse. The standard treatment is the antibiotic trimethoprim-sulfamethoxazole; rest and fluids prevent dehydration.

Which specific lettuce products were recalled in the 2026 outbreak?

Taylor Farms de Mexico recalled all iceberg lettuce sourced from central Mexico. Retail packs included Marketside Iceberg Salad (12-oz and 24-oz) and Shredded Lettuce (8-oz and 16-oz) sold at select Walmart stores with best-by dates from mid-July into early August. Food-service packs went to restaurants and distributors in more than 25 states.

Why did Michigan have far more cases than other states?

Michigan received a heavy concentration of the implicated shredded iceberg lettuce through restaurant chains, especially Taco Bell locations, and also experienced a broader surge of cases whose sources are still under study. Dense population centers in the southeast of the state amplified the count once the contaminated product entered local supply chains.

Is bagged salad safe to eat in Michigan now?

State officials say residents may resume usual practices for bagged salads and produce handling based on personal risk tolerance. They continue to advise against any remaining recalled Taylor Farms iceberg lettuce and recommend washing whole heads thoroughly after discarding outer leaves.

Disclaimer: This article is for general information only and is not medical advice. Consult a health-care provider for personal symptoms or treatment decisions.