Key facts
- Michigan has reported 3,309 cases of Cyclospora, a diarrheal parasite, as of July 14.
- Leafy greens are the primary suspect in the outbreak, according to the Michigan Department of Health and Human Services.
- Taco Bell restaurants are under investigation as a potential source of contamination.
- Taco Bell has temporarily removed lettuce, cilantro, onion, pico de gallo, and guacamole from its menu.
- Over 4,000 Cyclospora cases have been reported nationwide across at least 31 states.
Health officials are investigating a significant outbreak of the diarrheal parasite Cyclospora, which is surging nationwide, particularly in Michigan. The state has reported 3,309 cases as of July 14, a dramatic increase from its typical annual count, with 44 individuals hospitalized. Early data from interviews with over 1,000 sickened individuals in Michigan suggests that leafy greens are the likely source of contamination, according to the Michigan Department of Health and Human Services (MDHHS).
Michigan's chief medical executive, Natasha Bagdasarian, stated that while a definitive product has not been identified, lettuce has frequently emerged as a common item during the investigation. Separately, The Washington Post reported that state and federal officials are examining whether Taco Bell restaurants could be linked to the outbreak. Local media in the Detroit area noted that Taco Bell locations posted signs indicating an inability to sell lettuce, cilantro, onion, pico de gallo, and guacamole due to a nationwide recall, though no such recall has been officially announced by Michigan or federal authorities related to these cases.
A source familiar with the investigation told The Post that some affected individuals reported eating at Taco Bell, while others did not, suggesting the possibility of multiple sources. The MDHHS highlighted the difficulty in identifying Cyclospora sources due to its incubation period of up to two weeks and complex food distribution networks.
While Michigan has the highest number of cases, at least 31 other states are also reporting illnesses, with New York at 470 cases and Ohio at 397. The Centers for Disease Control and Prevention is compiling data on the nationwide tally, which already exceeds 4,000 cases. Health officials are advising caution with leafy greens, particularly bagged varieties, and recommend purchasing whole heads of lettuce, discarding outer leaves, and washing thoroughly. Cooking produce to at least 158° F (70° C) is the safest method to kill the parasite. Past outbreaks have been linked to bagged salads, cilantro, basil, raspberries, snow peas, and green onions. Individuals experiencing frequent watery diarrhea are advised to consult a healthcare provider for treatment, which typically involves antimicrobial medication, rest, and hydration.