Taco Bell Foot Traffic Plunges 19% Amid Lettuce-Linked Parasite Outbreak

Customer visits to Taco Bell restaurants dropped significantly after a parasite outbreak was linked to lettuce from one of its suppliers, dealing a blow to a key growth driver for parent company Yum! Brands Inc. (YUM). The decline in foot traffic has coincided with a notable drop in the company's stock price as investors react to the news.

Sharp Decline in Foot Traffic

According to mobile device data from Placer.ai, customer traffic at Taco Bell locations on Friday, July 17, fell nearly 19% below the chain's typical Friday average. This figure starkly contrasts with the broader fast-food category, which saw a much smaller decrease of 1.9% on the same day.

The data also indicates that traffic at the Mexican-inspired chain had been underperforming the industry average in the four days leading up to July 17, suggesting growing consumer concern as reports of the outbreak spread.

Market Impact and Corporate Response

The fallout has directly impacted Yum! Brands, for which Taco Bell serves as a primary engine for growth. Shares of Yum! Brands have fallen approximately 10% since July 10, when initial reports first connected the cyclosporiasis outbreak to the restaurant chain.

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In response to the health concerns, Taco Bell has removed all lettuce supplied by Taylor Farms from its locations across the United States. Health officials had traced cases of the gastrointestinal illness, which is caused by a microscopic parasite, back to lettuce served at the chain's restaurants.

Ongoing Health Investigation

The Centers for Disease Control and Prevention (CDC) has reported cyclosporiasis infections in more than 30 states, with Michigan being the most affected, recording 6,148 illnesses and 102 hospitalizations.

The Food and Drug Administration (FDA) is also investigating the matter. The agency initially reported a positive test connecting the cyclospora parasite to Taylor Farms lettuce but later stated on Sunday evening that a re-examination determined the result was a false positive. Health officials are continuing to investigate produce from Taylor Farms using alternative testing methods.