A sample of shredded iceberg lettuce from Taylor Farms de Mexico has tested positive for Cyclospora, federal health officials said, as the company expanded a multistate recall tied to a growing multistate outbreak.

The U.S. Food and Drug Administration said the contaminated sample was collected through targeted import surveillance and was not part of Taylor Farms' current recall. The agency said the positive lot has been detained and the California-based produce company is working to determine whether any of the implicated lettuce remains in commerce or in consumers' homes.

The positive test result comes after Taylor Farms announced it was voluntarily recalling iceberg lettuce sourced from central Mexico, while removing all such lettuce from the U.S. market, because of potential Cyclospora contamination.

"We are actively removing the implicated products," Taylor Farms said in its recall notice. "The company has stopped receiving product from the implicated lot, suspended distribution of the iceberg lettuce from Central Mexico, notified our customers, and we are continuing to work with the FDA, CDC, and state authorities."

TAYLOR FARMS PREPARING RECALL, DENIES BRANDED SALADS TIED TO OUTBREAK

The recall covers 12-ounce and 24-ounce bags of Marketside iceberg salad, as well as 8-ounce and 16-ounce bags of Marketside shredded iceberg lettuce distributed between June 29 and July 16 with "best if used by" dates ranging from July 18 through Aug. 3, according to the FDA. The recall also includes numerous products distributed to foodservice customers.

The affected lettuce was distributed in 27 states. The recall follows the FDA's announcement Thursday that Taco Bell would stop using lettuce from a supplier linked to the multistate cyclosporiasis outbreak, which has sickened 1,644 people and hospitalized 94 across five states. No deaths have been reported.

Taco Bell said it voluntarily removed potentially affected lettuce from the supplier in select states where illnesses have been reported.

OHIO MAN SUES TACO BELL FRANCHISEE, CLAIMING CYCLOSPORA INFECTION LEFT HIM SICK FOR 2 WEEKS

Taylor Farms had previously said its branded salad products were not associated with the outbreak.

In a statement posted to Instagram on Friday, the company reiterated that none of its branded salad kits are implicated and said it voluntarily removed iceberg lettuce sourced through its Taylor Farms de Mexico operation after receiving information from the FDA.

The FDA said its trace-back investigation Taylor Farms de Mexico as the supplier of shredded iceberg lettuce that was used at Taco Bell restaurants where infected customers reported eating before becoming ill. The agency said not every Taco Bell restaurant in the five states received lettuce from the supplier.

FDA SAYS TACO BELL TO STOP USING LETTUCE SUPPLIER LINKED TO MULTISTATE PARASITE OUTBREAK

The agency is investigating illnesses in Indiana, Kentucky, Michigan, Ohio and West Virginia, and has advised consumers in those states not to eat shredded iceberg lettuce from Mexico served at Taco Bell restaurants.

According to the FDA, Cyclospora is a microscopic parasite that can cause severe diarrhea, nausea, stomach cramps, fatigue and other gastrointestinal symptoms.

GET FOX BUSINESS ON THE GO BY CLICKING HERE

The agency urged anyone who purchased the recalled lettuce to throw it away immediately or return it to the place of purchase for a refund.

FOX Business' Brittany Miller contributed to this report.

Market Overview

Dodgers star Mookie Betts' glove company becomes official glove of Perfect Game in landmark partnership

Trump's first-term policies helped lower some insulin costs: HHS report

California wealth charts a quieter path to Florida as Gulf Coast enters multibillion-dollar boom

FDA says Taylor Farms Cyclospora lettuce test was a false positive

Trump touts Giant Eagle price cuts on more than 300 products through Labor Day

China cracks down on chatbot romances as birthrate crisis worsens: report

Dollar Tree to shutter 75 stores while growing its overall footprint

The 2026 FIFA World Cup is handing out record cash — here's who gets what

Major grocery chain beats Walmart, Aldi in price war as shoppers hunt for checkout relief

Taylor Farms lettuce sample tests positive for Cyclospora as recall expands