Experts advise caution and informed choices amid lettuce-related cyclosporiasis outbreak

Health officials are still working to pinpoint the source of a national cyclosporiasis outbreak that has been associated with iceberg lettuce imported from Mexico. Taylor Farms, a California produce company that distributed lettuce from central Mexico, recalled its entire lettuce inventory last month, but investigators have not confirmed the company as the definitive source.

"There’s a misconception when we walk into a store and buy, let’s say, mixed greens," said food safety compliance expert David Lennarz. "You think, ‘Oh, that came from a farm, they packed it, it came to my store, and boom, I buy it.’" He added that the produce supply chain is "incredibly complex" with many points where contamination could occur, and that traceability remains limited.

Dr. Zoe Weiss, director of microbiology at Tufts Medical Center, noted that symptoms of cyclosporiasis can appear up to two weeks after infection, making it difficult to assess the immediate impact of recalls. "The caseload might look like it’s rising before it comes down again," she said, emphasizing that a decline may not be visible right away.

Boston dietitian Kate Scarlata recommended consumers exercise "thoughtfulness" when shopping, suggesting that raw, uncooked produce be limited until the outbreak is better understood. She advised cooking vegetables and staying informed about public health advisories.

Experts also highlighted that washing and rinsing produce can reduce parasite levels, though it does not guarantee complete removal. They suggested avoiding bagged spring mixes that combine lettuce from multiple sources, as this increases the chance of contamination. Local produce from farmers markets may present fewer points of entry for parasites, though it is not risk-free.

Overall, officials caution against drastic dietary changes driven by fear and encourage shoppers to follow recall notices, verify product sources, and maintain standard food safety practices.