A Michigan couple filed a federal lawsuit July 20, 2026 against Taco Bell and produce processor Taylor Farms, alleging that contaminated shredded iceberg lettuce served at a Macomb County restaurant infected them with Cyclospora cayetanensis — the parasite at the center of one of the largest foodborne illness outbreaks the U.S. has seen in years.

The complaint, Hercula v. Taco Bell of America, LLC, et al., was filed in the U.S. District Court for the Eastern District of Michigan, Southern Division. It names Taco Bell of America, LLC; Taco Bell Corp.; Taylor Fresh Foods, Inc.; and Taylor Farms California, Inc. Karl and Gina Hercula of Clinton Township are represented by William D. Marler of Marler Clark, The Food Safety Law Firm and local counsel Drew A. Ruby of Ruby Injury Law in Farmington Hills.

How the Illnesses Unfolded

According to the complaint, both plaintiffs ate meals containing fresh iceberg lettuce at the Taco Bell at 37510 Gratiot Avenue in Clinton Township on June 21, 2026. Gina Hercula became ill around July 6, sought emergency room care the next day, returned for urgent care twice more, and received a laboratory-confirmed Cyclospora diagnosis around July 14. Karl Hercula fell ill around July 10 and was prescribed trimethoprim-sulfamethoxazole — the standard antibiotic treatment for cyclosporiasis — at urgent care on July 13. Both plaintiffs were still recovering when the complaint was filed. The suit brings claims for strict product liability, breach of warranties, negligence, negligence per se, and violation of the Michigan Consumer Protection Act.

"This case is about a meal, not a theory," said Marler. "Two people ordered lunch on a Saturday in June. Three weeks later one of them had a laboratory-confirmed parasite and the other was on Bactrim. The lettuce that did that came from somewhere, and somebody sold it."

Scale of the Outbreak

The Centers for Disease Control and Prevention issued a Health Alert Network advisory on July 14, 2026 reporting 1,645 laboratory-confirmed domestic cyclosporiasis cases since May 1, plus more than 5,100 additional cases under further analysis — nearly 7,000 in total across 34 states, ranging in age from 2 to 95, with 141 hospitalizations. By comparison, the CDC reported 249 cases nationally during the same period in 2025. The agency simultaneously posted an outbreak investigation notice identifying more than 400 illnesses in a single epidemiologically linked cluster spanning Michigan, Ohio, West Virginia, and Kentucky.

On July 17, Taylor Farms announced a recall of iceberg lettuce grown in central Mexico. Earlier in July, Taco Bell locations in Michigan and elsewhere had already posted in-store signs alerting customers that lettuce, cilantro, onion, pico de gallo, and guacamole were temporarily unavailable.

Traceability Gap at the Center

Marler pointed to a delayed federal traceability rule as a contributing factor. "The federal rule that would have required lot-level traceability records on leafy greens was supposed to take effect on January 20 of this year," he said. "It was pushed to 2028. These illnesses began in May. We spent two months doing by hand what the law was supposed to be doing automatically."

For restaurant operators managing supply chain food safety, the lawsuit underscores the liability exposure that flows downstream from upstream produce sourcing decisions. Cyclospora cayetanensis is a field- and water-borne parasite that ordinary washing may not eliminate, meaning contamination that originates during growing or processing is effectively invisible by the time product reaches a kitchen. The complaint argues the burden of prevention falls on those who grow, process, distribute, and sell fresh produce — not the foodservice unit that ultimately plates it.

The case adds to a growing body of food safety litigation shaping QSR ingredient sourcing, as chains face increasing scrutiny over the traceability and safety verification standards they impose on fresh produce suppliers.

Written by Michael Politz, Author of Guide to Restaurant Success: The Proven Process for Starting Any Restaurant Business From Scratch to Success (ISBN: 978-1-119-66896-1), Founder of Food & Beverage Magazine, the leading online magazine and resource in the industry. Designer of the Bluetooth logo and recognized in Entrepreneur Magazine's "Top 40 Under 40" for founding American Wholesale Floral, Politz is also the Co-founder of the Proof Awards and the CPG Awards and a partner in numerous consumer brands across the food and beverage sector.