Investigation Launched into Cyclospora Outbreak Linked to Taco Bell Lettuce

The U.S. Food and Drug Administration (FDA) has announced an ongoing investigation into a multi-state outbreak of illnesses caused by the parasite Cyclospora. The outbreak has been linked to certain shredded iceberg lettuce served at Taco Bell locations in Indiana, Kentucky, Michigan, Ohio, and West Virginia. This parasitic infection, known as cyclosporiasis, can cause significant intestinal distress and is particularly concerning due to the parasite’s resistance to common disinfection methods.

Cyclospora is a microscopic parasite that infects the human intestine, leading to an illness characterized by watery diarrhea, frequent bowel movements, and other gastrointestinal symptoms. Transmission typically occurs when food or water becomes contaminated with infected human feces. While direct person-to-person spread is considered unlikely due to the parasite’s need for a period outside the body to become infectious, the contamination of food sources remains a primary concern. The FDA is advising consumers to be aware of the symptoms, potential risks, and preventative measures they can take to protect themselves.

The incubation period for cyclosporiasis typically ranges from two days to two weeks, with symptoms often appearing around one week after infection. Beyond diarrhea, individuals may experience a loss of appetite, weight loss, stomach cramps, bloating, nausea, fatigue, vomiting, body aches, headaches, and low-grade fever. In some cases, individuals may experience no symptoms at all. However, if left untreated, the illness can lead to dehydration and more severe complications, especially for those with weakened immune systems, the elderly, and children. These complications can prolong recovery and may require more intensive medical care. Cyclosporiasis is treatable with antibiotics prescribed by a healthcare provider, and prompt medical attention is crucial, particularly for immunocompromised individuals who may require longer treatment durations.

Past outbreaks of cyclosporiasis in the United States have been associated with various fresh produce items, including raspberries, cabbage, basil, cilantro, parsley, broccoli, snow peas, sugar snap peas, and leafy greens. While cases acquired within the U.S. tend to occur between May and August, contaminated food or water consumed during travel outside the United States can also be a source of infection. Consumers are urged to monitor public health announcements from state health authorities, the FDA, and the CDC for information on foods linked to current outbreaks and potential avoidance recommendations.

For consumers, several preventative measures are recommended when handling and consuming produce, particularly during the typical season for Cyclospora outbreaks. It is advised to discard the outer layers of fruits and vegetables when possible, such as the outer two to three layers of leafy greens. Thorough rinsing of all fresh fruits and vegetables under clean running water is also recommended, even before peeling. For firm produce, a clean vegetable brush can be used for scrubbing. It is important to note that Cyclospora parasites are resistant to standard chlorine-based sanitizers, and consumers should avoid using soap or bleach for rinsing produce. Caution is also advised with pre-washed or pre-cut produce, as commercial washing processes may not be sufficient to eliminate the parasite. Preventing cross-contamination in the kitchen is vital; countertops, cutting boards, and utensils should be cleaned with hot, soapy water. For produce that can be cooked, heating it to a temperature of at least 158°F (70°C) is the safest method, as the parasite cannot survive at these elevated temperatures. As always, thorough handwashing with warm water and soap for at least 20 seconds before and after handling food is a critical step in preventing the spread of illness.

Individuals experiencing symptoms of diarrhea or other severe gastrointestinal issues that persist for more than three days should consult a healthcare provider, especially if they suspect they may have contracted the illness from potentially contaminated food. The FDA provides a resource for consumers seeking additional information on food safety through its website. Restaurants and retailers are also advised to adhere to strict food safety practices, recognizing that Cyclospora may be resistant to conventional chemical disinfection. This includes ensuring individuals experiencing symptoms of vomiting or diarrhea do not handle food. Safe food handling and preparation measures, including thorough washing and sanitizing of utensils, surfaces, and food storage areas, are paramount. Regular cleaning and sanitizing of food contact surfaces can help minimize the risk of cross-contamination.

Article by Mel Anara, based upon information from the U.S. Food and Drug Administration.

Video Spotlight