Gli Stati Uniti collegano la lattuga Taco Bell all'epidemia di parassiti che causano la diarrea

U.S. health officials have identified shredded iceberg lettuce supplied to Taco Bell as the likely source of a widespread outbreak of cyclosporiasis, a parasitic infection causing severe gastrointestinal illness. The Food and Drug Administration (FDA) traced the contamination to a single supplier based in Mexico, which provided the lettuce to Taco Bell locations in Indiana, Kentucky, Michigan, Ohio, and West Virginia. According to the Centers for Disease Control and Prevention (CDC), over 1,644 individuals in these five states have been confirmed to have contracted the illness, with 94 requiring hospitalization and no fatalities reported. The CDC emphasized that these figures represent only lab-confirmed cases directly linked to the outbreak at Taco Bell locations, excluding other instances of cyclosporiasis caused by different sources. The investigation began after a surge in reports of cyclosporiasis cases across the affected states. Federal agencies launched a multi-state probe to trace the origin of the outbreak, focusing on common food items consumed by the ill. The CDC confirmed that the specific strain of Cyclospora cayetanensis found in patients matched that detected in samples of the contaminated lettuce. This parasite typically requires ingestion of contaminated food or water and can lead to prolonged bouts of watery diarrhea, abdominal cramps, and fatigue. Without treatment, symptoms can persist for several weeks, though the condition is rarely fatal. Taco Bell responded swiftly to the findings, announcing that it had taken steps to remove the affected lettuce from its supply chain in the impacted regions. In a public statement, the company stated that it had "voluntarily removed potentially impacted lettuce from a supplier in select states." The company further indicated that the affected ingredient would be permanently excluded from its nationwide supply chain and replaced within 24 hours in certain areas. Taco Bell reiterated its commitment to food safety, stating that it views public health protection as a shared responsibility among restaurants, suppliers, and regulatory bodies. The supplier of the contaminated lettuce has not been officially named by the CDC or FDA, but media reports suggest that Taylor Farms, a major agricultural producer operating in the U.S., Canada, and Mexico, may be involved. The Washington Post cited anonymous sources familiar with the investigation who indicated that Taylor Farms had supplied the lettuce in question. However, neither the FDA nor the CDC has publicly confirmed this connection, leaving the identity of the supplier still under scrutiny. Health officials have urged consumers in the affected states to avoid consuming shredded iceberg lettuce from Taco Bell until further notice. They also recommended that individuals wash leafy greens thoroughly or cook them at temperatures above 158°F (70°C) to eliminate the parasite. These guidelines align with standard food safety practices aimed at preventing cyclosporiasis outbreaks. The CDC noted that while the current outbreak is linked to Taco Bell, previous incidents involving the parasite have included a variety of foods such as bagged salads, fresh herbs, and berries. Public health experts have highlighted the challenges of tracking cyclosporiasis due to its long incubation period and the difficulty of diagnosing the infection. Symptoms typically appear one to two weeks after exposure, making it harder to trace the exact source of contamination compared to other foodborne pathogens. Additionally, the CDC pointed out discrepancies between state-level data and national surveillance systems, noting that some states may include both confirmed and probable cases in their tallies, leading to variations in reported numbers. In Michigan, where the outbreak has been especially severe, local health departments have recorded over 5,000 cases of cyclosporiasis this year alone. Officials there have stressed the importance of continued vigilance in monitoring food supplies and reinforcing hygiene protocols in food service establishments. As the investigation continues, federal regulators are working closely with state health departments to ensure that all potential sources of contamination are identified and addressed promptly.