Chipotle Mexican Grill Inc. (NYSE:CMG) shares are slipping Monday. Investors seem to be weighing a combination of sector-wide food safety concerns and pre-earnings caution ahead of the company’s upcoming quarterly report.

Chipotle Mexican Grill shares are sliding. Why is CMG stock falling?

Cyclospora Outbreak Dents Fast-Casual Foot Traffic Across the Sector

A foodborne Cyclospora parasite outbreak linked to contaminated iceberg lettuce sourced from Mexico has rattled the fast-casual dining space, sending foot traffic lower across multiple chains. The FDA traced the outbreak to lettuce used in Taco Bell’s supply chain, prompting supplier Taylor Farms and distributor Sysco to pull the product.

Placer.ai foot traffic data through July 17 shows Taco Bell visits fell 18.9% compared to its day-of-week average from January through early July. Chipotle was not spared, recording a 6.9% decline in customer visits over the same window, as broader consumer anxiety around fresh ingredients at Mexican-style fast-casual restaurants appears to be weighing on traffic regardless of direct supply chain involvement.