Explosive Diarrhea Tied To Taco Bell

The government now says a fast-food taco topping is behind one of the biggest “explosive diarrhea” outbreaks in recent memory — and it all traces back to a single shredded iceberg lettuce supply chain.

Story Snapshot

Federal health agencies link a five-state cyclosporiasis outbreak to shredded iceberg lettuce served at Taco Bell locations.
Investigators traced the problem to Taylor Farms iceberg lettuce grown in central Mexico and shipped through Taco Bell’s supply chain.
More than 1,600 illnesses are tied to Taco Bell exposure, with thousands more cyclosporiasis cases under review nationwide.
Taylor Farms is yanking Mexican iceberg from the U.S. market, while Taco Bell shifts suppliers and pulls lettuce from menus.

How a Taco Topping Became Ground Zero for a Parasite Outbreak

Health officials say a multistate outbreak of cyclosporiasis, an intestinal illness that causes severe and sometimes “explosive” diarrhea, is linked to shredded iceberg lettuce served at Taco Bell locations in five states. The Centers for Disease Control and Prevention and the Food and Drug Administration released a joint investigation tying illnesses in Indiana, Kentucky, Michigan, Ohio, and West Virginia to this one ingredient on the menu. The warning is blunt: do not eat shredded iceberg lettuce at Taco Bell in those states right now.

Investigators did what they always do in a foodborne outbreak: they started with sick people’s stories. Patients across the Midwest kept naming Taco Bell and kept describing the same orders loaded with lettuce. That pattern pushed the Centers for Disease Control and Prevention and the Food and Drug Administration to run a traceback, following delivery records and invoices from restaurant, to distributor, to processor, to farm. Those paper trails converged on shredded iceberg lettuce shipped into Taco Bell stores from Mexico.

What Investigators Found in the Supply Chain

The Food and Drug Administration says its traceback investigation identified a single supplier, Taylor Farms de Mexico, providing shredded iceberg lettuce to Taco Bell locations where many sick people ate before they fell ill. The agency describes a clear “convergence” on that supplier and on iceberg lettuce sourced from central Mexico as the common thread tying these five states together. Taylor Farms supplies only a small slice of the national iceberg market, but it was the slice that mattered in this outbreak.

Taylor Farms announced it would remove all iceberg lettuce sourced from central Mexico from the United States market and told regulators it would initiate a recall. The company stressed that the implicated farm represents less than one percent of U.S. iceberg supply and said no other Taylor Farms products or branded salad kits use that lettuce. From a business standpoint, that is damage control, but from a public health standpoint, it is also the response regulators want to see when a specific supply line is under suspicion.

What Taco Bell and the Feds Are Telling Customers

The Centers for Disease Control and Prevention reports 1,644 people with confirmed Cyclospora infections tied to Taco Bell exposure in the five affected states, with illness onset dates from mid-May through mid-July. Officials also note this outbreak is just one slice of a larger national wave of cyclosporiasis cases that are not all connected to Taco Bell or iceberg lettuce. Many people never see a doctor or get tested, so the true number of sick people is almost certainly higher.

Taco Bell says it stopped using lettuce from the supplier flagged in the Food and Drug Administration traceback and has removed certain fresh ingredients from some restaurants as a precaution. Signs at drive-throughs in Michigan list lettuce, cilantro, onions, pico de gallo, and even guacamole as temporarily off the menu while the company reshuffles sourcing. From a common-sense, conservative perspective, that is exactly what customers should expect: if there is doubt, pull the risky items fast, then argue about details later.

Why These Outbreaks Keep Coming Back to Leafy Greens

Leafy greens like lettuce and salad mixes are repeat offenders in foodborne outbreaks. Federal records going back years show romaine and other lettuces showing up again and again in investigations of Escherichia coli and other pathogens. In a 2018 outbreak, officials warned against all romaine from a California growing region before every single farm was nailed down, because the pattern in case interviews and traceback data pointed there first and lives were at stake. That same playbook now applies to iceberg at Taco Bell.

Cyclosporiasis outbreak linked to shredded lettuce served at some Taco Bell locations: CDC, FDA https://t.co/AF5oHUatQR

— ABC11 EyewitnessNews (@ABC11_WTVD) July 18, 2026

The parasite behind this outbreak, Cyclospora, spreads through contaminated food and water, not from person to person, which means the contamination almost certainly happened before the lettuce reached the restaurant. Washing bagged lettuce helps but cannot reliably remove Cyclospora from tiny crevices in leaves. Cooking would kill it, but Americans now eat mountains of raw salads, wraps, and taco toppings. That trend pushes more fresh, imported produce into the chain and raises the stakes when something goes wrong.

What Ordinary Diners Can Do to Protect Themselves

State health officials in Michigan, which has logged thousands of suspected cyclosporiasis cases, now tell the public that early results point to lettuce or salad greens as a likely source, while they keep the door open to other foods. That cautious language reflects the gap between what federal investigators see in national data and what state offices can prove with local lab work. For the average person, the practical advice is simpler than the bureaucratic dance.

Health agencies say to avoid shredded iceberg lettuce from Mexico at Taco Bell in the named states until the investigation is finished. At home, they urge people to buy whole heads of lettuce when possible, peel and discard the outer leaves, and rinse all fresh produce under running water even if the bag claims it is pre-washed. Cooking produce where it makes sense, and peeling fruits and vegetables with skins, cuts risk even more. That is not alarmism; it is basic stewardship of your own health in a system that will never be perfect.