Taco Bell has temporarily removed lettuce, guacamole, and pico de gallo from many menu items as a parasite causing severe diarrhea spreads across multiple U.S. states.

The fast-food chain acted out of caution as health officials investigate cases of cyclosporiasis, an intestinal illness linked to contaminated produce. The move affects popular items, including burritos, tacos, and bowls that typically feature fresh ingredients.