Taco Bell-linked lettuce outbreak weighs on restaurant stocks

A cyclosporiasis outbreak tied by federal health officials to shredded iceberg lettuce served at some Taco Bell restaurants has rattled restaurant stocks and raised fresh food-safety concerns. Analysts cited by CNBC said the damage to Yum Brands and the wider restaurant sector is likely to be short-lived if the investigation does not expand.

The Centers for Disease Control and Prevention said the outbreak has sickened more than 1,600 people in five states and that no deaths have been reported. The CDC said Thursday that its investigation connected the illnesses to shredded iceberg lettuce served at Taco Bell locations in Indiana, Kentucky, Michigan, Ohio and West Virginia.

According to the CDC, cyclosporiasis is caused by a parasite and can resemble a severe stomach illness, with symptoms often appearing two to three weeks after infection. CNBC reported that the Food and Drug Administration is working with the supplier to determine whether the lettuce was distributed beyond Taco Bell.

Stocks react as companies respond

Yum Brands, Taco Bell’s parent company, fell nearly 7% over five days as investors reacted to the outbreak, CNBC reported. Other restaurant companies that use fresh produce also moved: Sweetgreen dropped nearly 13% during the week, while Cava fell more than 3%.

CNBC reported that Sweetgreen and Cava rebounded Friday, with Sweetgreen up more than 17% and Cava up about 2%, after the CDC did not name their ingredients as suspected sources. Chipotle saw less share movement during the week, according to CNBC.

Taco Bell said Thursday that it was voluntarily removing potentially affected lettuce from a supplier in selected states. The company also said the supplier’s affected ingredient would be removed from its nationwide supply chain indefinitely and replaced within 24 hours in selected states.

Sweetgreen said this week that it had checked with suppliers and that none of its ingredients had been identified in the investigation, according to CNBC. The company also said it does not use iceberg lettuce on its menu. Chipotle said Friday that it does not serve shredded iceberg lettuce and does not believe its ingredients are connected to the outbreak, CNBC reported.

Supplier scrutiny and expected recovery

CNBC cited reports that the lettuce used at Taco Bell may trace back to Taylor Farms, a supplier that distributes to restaurants and sells products in grocery stores. Other media reports said Taylor Farms was preparing a recall Friday. CNBC said Taylor Farms did not respond to its request for comment.

Analysts told CNBC that the outbreak could hurt sales temporarily, especially in the most affected states. Placer.ai data cited by CNBC showed recent traffic declines at chains serving fresh lettuce, including a nearly 6% drop at Taco Bell and a more than 7% decline at Panera Bread over the past week.

TD Cowen analyst Andrew Charles told CNBC he expects the issue to create risk for one quarter and then ease, comparing it with the recoveries after E. coli outbreaks involving McDonald’s in 2024 and Wendy’s in 2022. Charles also told CNBC that the issue involves toppings rather than Taco Bell’s core meat products, which he said could limit the effect on customer behavior.

Evercore ISI analysts wrote Friday that they expect attention to shift from Taco Bell toward the supplier if the investigation remains focused on lettuce. The analysts said Taco Bell could return to positive same-store sales growth within weeks, citing McDonald’s recovery timeline after its 2024 food-safety scare.

Gerry Chiaro, an associate professor of marketing at Northwestern University, told CNBC that Taco Bell still has to rebuild customer trust. Chiaro said customers deal with the restaurant brand directly, even when a supplier may be involved, making clear communication and accountability central to the recovery.

This story draws on original reporting from CNBC.