Health authorities in the U.S., UK, and Europe have reported a surge in cyclosporiasis cases linked to contaminated produce, with at least 22,000 confirmed cases in the U.S. and 67 in the UK since May. The U.S. Food and Drug Administration (FDA) has traced the outbreak to iceberg lettuce processed at Taylor Farms’ facility in central Mexico, leading to voluntary recalls of affected products.
The parasitic infection, caused by Cyclospora cayetanensis, spreads through contaminated food or water and triggers prolonged watery diarrhea, abdominal cramps, and vomiting, lasting up to a month in some cases. Symptoms often begin with a bloating sensation, followed by frequent bathroom use—some patients report up to 20 bowel movements per day. While no deaths have been reported in the UK or Europe, the U.S. has recorded two fatalities linked to the outbreak.
Public health agencies are urging travelers to North, Central, and South America to take precautions, including washing produce thoroughly and avoiding raw leafy greens in affected regions. The long incubation period—typically 2 to 14 days—complicates traceback efforts, as contaminated ingredients may no longer be available for testing.
Outbreak Triggers Recalls and Economic Fallout
The FDA’s investigation has identified Taylor Farms’ Mexico facility as the likely source of the U.S. outbreak, prompting a voluntary recall of products supplied from that location. The agency is also tracking six additional active outbreaks with no confirmed source, though case numbers remain smaller.
The economic impact has been immediate. Restaurant chains and grocery stores have seen declining sales amid consumer concerns. Sweetgreen reported a 6% drop in same-store sales in July, while Chopt Creative Salad Co. saw a 24% decline in foot traffic following the FDA’s announcement. Salad and Go, a fast-casual chain, filed for Chapter 11 bankruptcy in part due to the outbreak’s effects on its business.
Taco Bell, which uses iceberg lettuce across its menu, initially experienced a sales dip but reported recovery by late July, according to Yum Brands executives. Meanwhile, prepackaged salad sales in U.S. grocery stores fell 14% during the four weeks ending July 25, compared to the prior year, according to NielsenIQ data.
How Cyclospora Spreads and Who Is at Risk
Cyclospora is a microscopic parasite that infects the small intestine, where it multiplies and burrows into gut cells. The body’s immune response triggers severe, watery diarrhea as it attempts to expel the parasite. While most cases resolve within a few weeks, some patients experience symptoms for up to a month.
The parasite is primarily spread through contaminated produce, including:
- Iceberg lettuce
- Green onions
- Raspberries
- Fresh herbs
Unlike bacterial infections, Cyclospora cannot spread person-to-person—transmission requires ingesting contaminated food or water. Travelers to tropical and subtropical regions are at higher risk, but outbreaks have now been reported in temperate climates, including the UK and Europe.
Health experts emphasize that proper food handling can reduce risk. The Centers for Disease Control and Prevention (CDC) recommends:
- Washing all fresh produce under running water
- Peeling fruits and vegetables when possible
- Avoiding raw produce in high-risk areas
Dr. Paul Hunter, a microbiologist at the University of East Anglia, notes that while Cyclospora is not life-threatening for most people, it can cause severe dehydration in vulnerable groups, including young children, the elderly, and immunocompromised individuals.
Global Response and Long-Term Concerns
Health officials in the UK and Europe are monitoring the situation closely, with 67 confirmed cases reported in Britain since May. The European Centre for Disease Prevention and Control (ECDC) has issued travel advisories for regions with active outbreaks, though no large-scale recalls have been announced in Europe to date.
In the U.S., the FDA and CDC are collaborating with Mexican health authorities to investigate the supply chain and prevent future contamination. The World Health Organization (WHO) has not yet issued a global alert but is tracking the spread as part of its foodborne disease surveillance.
Experts warn that climate change may exacerbate the problem, as warmer temperatures can extend the survival of parasites in water and soil. Dr. Lindsey Ann Edwards, a senior lecturer in microbiology at King’s College London, states that while Cyclospora outbreaks are not new, the increasing globalization of food supply chains raises the risk of wider, faster transmission.
What’s Next?
Public health agencies are urging continued vigilance as the peak travel season approaches. The FDA has not ruled out additional recalls, and restaurant chains are adjusting menus to reduce reliance on high-risk produce.
For now, health officials stress that awareness and proper food handling remain the best defenses against Cyclospora. While the outbreak has caused significant disruption, experts emphasize that most cases are manageable with hydration and rest—though recovery can be prolonged and uncomfortable for some.