A Lettuce-Linked Parasite Outbreak Has Sickened 11,458 People Across 20 States

A parasite outbreak linked to recalled iceberg lettuce has expanded to 20 states, with 11,458 illnesses, 495 hospitalizations and two deaths now reported, federal health officials said Thursday.

The scale is startling, but the immediate consumer message is more measured: the recalled lettuce’s best-by dates have passed, and the U.S. Food and Drug Administration says the product should no longer be available in stores or restaurants. The investigation remains open as officials continue adding cases that began before the recall.

The outbreak added 528 cases in one week

In their August 27 update, the FDA and Centers for Disease Control and Prevention raised the outbreak count from 10,930 illnesses in 17 states to 11,458 illnesses in 20 states. Georgia, Tennessee and Texas were newly added.

The CDC’s current outbreak advisory lists 495 hospitalizations and two deaths. The FDA previously said both people who died were in Michigan, had significant underlying health conditions and became ill before the July 17 recall.

Cases have been reported in Arkansas, Georgia, Iowa, Illinois, Indiana, Kansas, Kentucky, Massachusetts, Maine, Michigan, Missouri, Nebraska, New Hampshire, North Carolina, Ohio, Oklahoma, Pennsylvania, Tennessee, Texas and West Virginia. The last reported illness onset was August 15.

What lettuce officials linked to the illnesses

Investigators linked the outbreak to processed iceberg lettuce from Taylor Farms de Mexico, sourced from central Mexico. The case group includes people who reported exposure at multiple locations, including some who had previously reported eating at Taco Bell.

Taylor Farms de Mexico voluntarily removed all iceberg lettuce sourced from central Mexico from the U.S. market on July 17. The recall included certain Marketside iceberg salad and shredded-lettuce products sold at select Walmart stores, along with products distributed to food-service customers.

That distinction matters: the 11,458 cases are not all Taco Bell customers. The federal count now combines laboratory-confirmed illnesses linked through interviews and exposure data to the broader recalled-lettuce supply chain.

Why the total can rise after the recall

A higher count does not necessarily mean thousands of people were newly exposed this week. The FDA says it can take as long as six weeks for health officials to determine whether a sick person belongs in the outbreak. Most illnesses began before the recall, and the agency says all recalled lettuce tied to this outbreak is off the market.

FDA inspections and sampling at growers and the processing facility in Mexico are continuing with Mexican officials. Because people with mild illness may recover without medical care or testing, authorities also caution that the true number of infections is probably higher than the confirmed total.

Symptoms can be easy to miss—or misdiagnose

Cyclosporiasis is an intestinal illness caused by the microscopic parasite Cyclospora cayetanensis. Symptoms usually begin about a week after exposure, though the range can run from two days to two weeks or longer.

The most common warning sign is frequent watery diarrhea. Other symptoms include loss of appetite, weight loss, stomach cramps, bloating, gas, nausea and fatigue. Some people also experience vomiting, body aches, headache or fever. Without treatment, symptoms can last from several days to a month or longer and may disappear before returning.

A crucial testing detail could prevent a missed diagnosis: the CDC says routine stool tests do not always screen for Cyclospora, so patients may need to specifically request testing.

What consumers should do now

Federal officials are not advising consumers to avoid all lettuce. The recalled products should already be gone because their best-by dates have passed.

Anyone who previously handled a recalled product should clean and sanitize containers and surfaces it touched. People with compatible symptoms—especially those who ate shredded iceberg lettuce in the two weeks before becoming ill—should contact a healthcare provider, stay well hydrated and mention the possible exposure. The CDC also advises washing hands and fresh produce thoroughly, while noting that washing alone cannot guarantee removal of Cyclospora.

The investigation is ongoing, and officials say more cases may still be added as interviews and laboratory reviews catch up with illnesses that began weeks ago.

Sources: U.S. Food and Drug Administration, Centers for Disease Control and Prevention, Reuters and The Associated Press.